I ran into this on a Principle question. I diagrammed it as a unless condition, I was not completely sure though and really nervous about it.

Is it the same as either or/or not both? I looked in my notes for the group 1-4 lessons and I didn't find it in there.

0

3 comments

  • Wednesday, Aug 17 2016

    @albertoduro1xx758

    All A's are B's EXCEPT WHEN they are C's.

    In this case, I would personally diagram it as (A -> B) -> C

    Taking the contrapositive, that would be C -> not (A -> B)

    I think this way makes the most sense to me and probably how I would do it! It definitely took me a second to think about it though. lol

    0
  • Wednesday, Aug 17 2016

    @albertoduro1xx758 All A's are B's EXCEPT WHEN they are C's.

    In this case, I would personally diagram it as (A -> B) -> C

    Taking the contrapositive, that would be C -> not (A -> B)

    If you just treat (A->B) as a variable, say X, then it just reads:

    X -> C

    Contrapositive: C -> X

    If you take an example, "All Jedi use the force except when they are tired."

    (Jedi -> Use the Force) -> (not tired)

    Tired -> not (Jedi -> Use the Force)

    The contrapositive would read: If they are tired, Jedi are not able to use the force.

    0
  • Wednesday, Aug 17 2016

    An example would be All A's are B's EXCEPT WHEN they are C's. That in english essentially means, if you are an A but NOT a C, then you are a B. So Diagrammed, it would be A+~C---->B. Can anyone check my Reasoning on that? Lol

    0

Confirm action

Are you sure?