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Hi,

If there is a condition that is "All A are B", does that also mean that "some B are A" as well? Thanks.

Yes. It's that "inference ladder" thing. A --> B also means A <--some--> B.

Correct.

Ex)

All MLB all-stars are baseball players.

You can infer that some baseball players are all-stars, but you can't imply that ALL baseball players are all-stars.

You must remember that when you have an If A then B statement, SOME B are A, but not ALL B are A.

If youre confused about conditional reasoning go over that section in the logical reasoning bible and there's a conditional reasoning guide here on TLS that is also helpful.

Good luck!

Strictly speaking, no. But, assuming that at least one thing is A, then yes. Since LSAC probably doesn't worry about the situation in which nothing is A, I think it's a pretty safe bet that "All As are Bs" entails "Some B is A." So, for example, if all politicians are liars, then at least one liar is a politician--i.e., assuming that there is at least one politician.

tamlyric wrote:Strictly speaking, no. But, assuming that at least one thing is A, then yes. Since LSAC probably doesn't worry about the situation in which nothing is A, I think it's a pretty safe bet that "All As are Bs" entails "Some B is A." So, for example, if all politicians are liars, then at least one liar is a politician--i.e., assuming that there is at least one politician.

Right. In LSAT logic, if a word for something exists, that something exists.

There could be no A.

My system: Forget the rules and just think about what makes sense.
(easy for me to say, I'll never take another LSAT)

..

gdane5 wrote:You must remember that when you have an If A then B statement, SOME B are A, but not ALL B are A.

If youre confused about conditional reasoning go over that section in the logical reasoning bible and there's a conditional reasoning guide here on TLS that is also helpful.
Good luck!

Really?

Does anyone have a link to this?

op-ti wrote:

gdane5 wrote:You must remember that when you have an If A then B statement, SOME B are A, but not ALL B are A.

If youre confused about conditional reasoning go over that section in the logical reasoning bible and there's a conditional reasoning guide here on TLS that is also helpful.
Good luck!

Really?

Does anyone have a link to this?

http://www.top-law-schools.com/conditio ... oning.html

-I don't know if that was the one being referenced, but it's the only one I know of on here.

eskimo wrote:

op-ti wrote:

gdane5 wrote:You must remember that when you have an If A then B statement, SOME B are A, but not ALL B are A.

If youre confused about conditional reasoning go over that section in the logical reasoning bible and there's a conditional reasoning guide here on TLS that is also helpful.
Good luck!

Really?

Does anyone have a link to this?

http://www.top-law-schools.com/conditio ... oning.html

-I don't know if that was the one being referenced, but it's the only one I know of on here.

THANK YOU eskimo!