Interested! Instagram is ethan.golba

"only" and "only if" are both group 2 indicators.

You may be getting confused about the fact of "the only" being a group 1 indicator which is definitely a bit hard to remember.

Yes those statements are equivalent and both break down to F -> J.

:)

Yes this is a valid argument.

in lawgic (long form for explaination)

Wear collars -> Dogs

Mistsy^/Dog

----------------

Mitsy^wear collar

This is the contrapositive argument

A -> B

X^/B

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X^/A