LSAT PrepTest 85 Logic Game 3 (September 2018) textbook publishing company six linguistics – 7Sage



July here from the sevens age and we're looking at game three from prepped SAT five this one is a standard grouping game let's take a look at the setup we're told that there's a textbook company they're gonna publish six books LM p RS and Z so okay so we suspect these are game pieces because we read on and we're told that the three editors of the company editors F G and H are going to edit the books so sounds like grouping game right we have three groups F G and H with these three groups we have to figure out these 16 pieces and which group do you go to now is it a one-to-one do the pieces get to repeat must each group have at least one item in it well all those questions are resolved by reading on they do tell us that each editor that is to say editors are groups right each one of these must edit at least write a minimum one so you just go ahead and draw a slot underneath each to represent that we I can't leave any of you blank I just shove all the six game pieces into these two no that's not okay so each one gets at least one game piece and the textbooks the game pieces don't get to repeat each textbook must be edited by exactly one editor meaning are three I'm just gonna pick on you if our shows up under G then that's it ours done there's no more no more ours you can't you can't show up under these other two great so that's a standard grouping game so now that we got the game board game pieces looks like the rules first one tells us that F must edit L or Z or both L or C or both so you have to have at least one of them but having one of them the other one well you could have the other one as well you don't have to so that rule instead of writing my rulest i want to visually represent this rule on my game board okay this that's the recurring principle in logic games you always want to strive to positively visually represent things as much as possible so here I'm just gonna write l / z to occupy this spot you see the thing is once you you might be thinking well is that does that take care of the rule you know once I put it L Z is there something else about this we'll have to worry about an answer is there isn't this does in fact take care of the rule just think about it okay let's say we put it out here down what while this rule satisfied has to edit our see what about Ziva right you might be thinking well what about see what about CC he is free to go here right could be both doesn't have to be well with the cookie bowls or Seco go here in which a is definitely not both right or Zico go here it's not both alright so same thing without you swap them out Zia now swap them out I said you see this you know representing like that does like this does in fat completely capture the rule so good let's move on we're sorry let's turn to question 14 and eliminate all right so look for an F without L Z here so here we got it's fine he's got Z this one's no good gone I've has L here L here L here so great we got rid of one answer choice the next rule is a rule I'm gonna write down my rule list it tells us that if G is editing we're not saying G must edit M but if you choose to put M into G then that's it M is not gonna G rather it's not gonna get to edit anything else okay so here I'm gonna again just visually represent this rule and just by by closing it off like that okay so that's kind of interesting you want to consider this rule we're sorry first let's just return to 14 look for and then G M NGO way but this is not solo that's not okay see I spotted M and G supposed to be solo can't have anything else but here you know some violation this is fine this is fine now let's consider how this rule place with the previous rule on the game board so one version if it is simple enough you just put the M into G like this and then you close this group out M is taken care of you have five game pieces left one of which is already this L is the compound game piece it's already in F so you have really four game pieces life you have our s P and your last game piece z /l right whichever one you don't choose and you got to split them up so it's at least one one maybe it's I don't know maybe it's three over here one over here or three over here one over here or your other distribution it's two to try to do so that's the sort of the more straightforward version now alternatively what if you decide that M is not going to go into G okay well then G is free to have more than just one game piece in it but where's I'm gonna go again this invokes a recurring principle and logic games never leave things nay in the negative form if as much it worked so I shouldn't say never sometimes you can't help it but try as much as you can to see what things look like in the positive form what does it mean that M can't be in G it means that M has to be in either f4h that's what it means right so here you just have to ok M can't be here well then I have to toss em either here or here and that's about as far as I can go okay but that's it I mean we've done our due diligence we played with the rules right let's move on to the next rule which tells us that H is editing exactly – so that's fantastic I'm just gonna draw another slot over here and just close it out close it out this is a I can already feel it's a very restrictive rule because six slots to begin with you see four of them already laid down we have two slots left so either these two slots both go into here and this one's done right to 0 like this or you switch it up to 0 like this or what's the only other option 1 1 right 1 1 like this I'm not sure what else I can do with this yet but it's important just to you know like like I said every time you get a rule you have to play with it think about how it interacts with the other previous world the previous rules here in this instance the previous world were just that slot distributional rules that that was told to us in the opening paragraph ok but anyway so we have two underage we're gonna close this out and now we're gonna return to question 14 check for violations HS 2 over here HS 2 over here HS 2 over here so okay that didn't work we're gonna move on to our next rule which I'll call rule number 2 H I cannot write H cannot have M so yeah that's interesting because we already talked about em before um if it were in G well it's in G & G gets closed out alternatively remember we contemplated this art what if M is not in G M is not in G means M is in F 4 H but now this rule saying om can't be an H either so really once again invoking that principle if let's try to have things in the positive if we can right here we can what does the mean if M is not in H or rather this what just tells us not if this were just how says that M cannot be an H so really what this rule is saying is that M has to be in either F or else G there's no other option from okay we know what happens in this version in this version just kicked into were kicked into rule number one and this happens right alternatively if not in this version while you're just in this version and then I don't know look at the other rules right so this is really powerful we're just you know playing around with the rules pushing it together with other stuff making inferences already and now let's check again the question 14m have better not be an H this one's fine this one is not fine this one has M&H so you're gone this one is fine and finally our last rule tells is that P and s have to be together so here look P and s are split up no good he is the correct answer choice and this rule is something on also going to represent in my rule list whoever is editing P must be editing the S so they are just together in a vertical box like this so now before moving on to the other questions I want to do something with our list of game pieces well first we got to check for a floater so R is the floater but the thing I want to do is I want to just I want to rewrite this okay I'm gonna rewrite it somewhere closer to my game board because I want the visual proximity I can better see when pieces have to fall into place so to speak okay so R is my floater so I'll start there are in a circle no rules talk about that now with this you think what this PS thing over here maybe I shouldn't have scratched out with PS it's it's like you can just write the rule right over here P and s it's just one giant item right maybe there just falls right into here taking care of the two slots and H maybe it goes into here then of course M has to write that pushes a mataji M has to go into F or maybe PS goes into here right so that's our PS taken care of the LZ aren't really two separate items I mean they are in a sense but in another sense they're not notice that none of the other rules talk about Alton see the same that one and only rule applies to L and the same way it applies to Z that means these two game pieces are totally interchangeable anytime in an answer choice to see an L you might as well just switch it out with a Z right over here is L you might as well just swish out like that it's the same answer choice they're totally identical game pieces bound by exactly the same rule so since we already have one of the game pieces down in F the other game piece or the other game piece is a z /l game piece I say we have one game right two three four five our compound game pieces and then finally what do we have we just have an M to worry about okay and this M has to go into either F or else G and if it goes into G G gets closed out that's this is really the only additional you can see now the redundancy right you see the redundancy and rule number three like this okay rule number two you can see they were done then see here like this right so this is unnecessary and of course the redundancy how many ER game pieces listed less conveniently all right you know in a in a mess up here I don't like this I like this list of game pieces far better so really all that's left to me visually is just this this is going to be much easier to work with than what I have before okay so for the rest of the questions and you might be wondering should I split it's actually not a bad idea to split you don't get too many game boards so you can definitely split it but I looked at the question so we have only four questions three of which give me additional premises right only 18 is a naked must be false question so I I chose not to split in it was fine okay so now let's look at the questions question 15 gives us an additional premise that art is going into H so I don't want to know what could be true so okay we're gonna write 15 copy the game board over take care of this premise put R into H and now what well it's a lot easier to see now what if your game board looks like this where all your game pieces and your rules are kind of combined together and close to the game board see the first thing hopefully you notice that well you don't have to worry about all right so now what well what else what else I mean this is a big game piece PS here it's not gonna fit into H anymore so PS has to go here or here right and mmm never what's gonna go here so I'm again just you know either here or else here so oh look it's just this last game piece this is the L game piece that now has to go here right cuz you have I mean you have to fill it in with something and no one else is gonna go into H so it has to be 0 or L that goes into H alright again the other one where's the other czl it's enough right there just kind of trading up like that so armed with this information let's see if we can eliminate some ass you can definitely get rid of this one here HP there's no way P's going to age right it just it doesn't fit right what about a F gets both cnl no way F is getting exactly 1 of 0 in this instance cuz the other one has to be reserved for H so gone and what about C and D G doesn't get to have either one so do you see this is also like sort of where you can eliminate answers because if you realize the NL are the same game piece well then you just have two answers that are exactly the same if one is right the other one has to be right so on that meta analysis you only get to have one right answer you can just get rid of these two I mean you can also kind of see why like there just isn't a zero or L to spare for G right because one is in F the other one is in H okay so either one of those reasons he can eliminate these two n this is correct question 16 tells us that Z is going into G and it's asking for a could be true okay so copy your game board over again with all of them you know game pieces / rules near it and accommodate this new premise this new information we have which is Z and G so here we're choosing they'll we're not choosing the Z anymore this game Keys has gone it's a result of which one and now what well you just have one two three four game pieces left which one gets called into action well we have our rules about em you know if M is in G and look G was G's called into action so you look for the rule that our new premise talked about which is r1 it has something to do with G and no longer it gets to be Solo in G because Z is already occupying G okay so you can't repose back and then therefore it doesn't get to go to G M has to go to F great that's an inference M has to go to F now you just have three game pieces left but really it's kind of two game pieces because this is a big king piece and look what are you gonna do how are you gonna fill in the H you cannot put R into here you put R into here there's nobody to take this last law because PS are like well either we both come or we neither of us comps so you see you're just messing this rule up so you have no choice you have two PS over here and now you do have a choice are no more rules all your distributional rules are taken care of – so are it just gets the float and since they're asking for it could be true your suspicion should fall on the item moves in this case are there are two answers that talk about our one of them straight up wrong the other one is that could be true question 17 is giving L over 2 H okay and it's asking for a must be true so we're gonna write 17 copy the gameboard over along with your rule slash game pieces take care of the additional premise they give us which is L is an H so this is resolved now we're picking the Z over here not the L and this game piece is gone and so you see we're in a very similar situation to when we found ourselves for a question of 15 again it's this question of well you know this is not gonna fit anymore right so you have to go here or here and um never got to go here anyway so M has to go here here so once again we are forcing our only remaining game piece into H you can see it's just the kind of the opposite right and the question fitting they gave us the are up here and then we force the z / l into here here are they're giving us the L up here so enforcing the R into here here so that's the first inference we made let's go ahead and check to see if it's and the answers if it is safe this time we're not to do more work than necessary and indeed it is and finally question 18 cannot be true so in other words must be false for answer choices could be true no additional premises so what do we do what's the strategy here well one thing you can do is just brute force if your game board looks like this and brute-forcing doesn't take too much time alternatively you might notice that G has three game pieces assigned to it it's not the particular game pieces that you want to focus on it's the number of game pieces that you want to focus on and see like you know G either gets to have exactly one game piece if M is with it right so that's one option she gets have one and that's with M alternatively if G doesn't get to M where's that M is in F right so you see that already limits one two three four five maximum six alright so G is limited to either having one game piece or two game pieces so G with three game pieces can't be true so that's the I guess I don't know I mean that's not how I did it but I'll bet money that that's how somebody out there right but anyway I'm gonna just brute force this because that's how actually did it but you know like us out with this game board it doesn't actually take too long F has LPS Prezi just thinking okay fine you just have two L's already here just toss the PS over here yeah seems like it'll work but just toss em into G make it solo into G and that's it you got the R plus the other one right the other one here being Z going into these – that's fine how it works could be true okay and again the important thing is you wanna you don't want to draw a game board out to the extent that you can you don't want to draw a game but if you do it's just more time-consuming you just want to kind of play it around in your mind's eye and be like I'm 75 percent confident this works so let's let's just move on to be okay which says L R and Z so now we're tossing all of these guys into here right that's one two three game pieces into here it's like yeah you know Kostas in here again um this in this instance Emma's going with a G solo into here so again I'm like you know 95% confident this works without actually drawing out a new game board and testing and making sure so it's fine and now you get to this one C says a PS and are okay fine I've never done this before maybe let's put PS into G and are also into G so now what well now you're screwing H over what are gonna do with H you gotta take two pink pieces in here and it's like these are the only two game pieces you have you're gonna put both of them into H M is refusing M doesn't go to H right that's the contradiction here

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