#Extremelyconfused

No student is chosen for Gryffindor unless they exhibit bravery. Therefore, if a student exhibits bravery, they will be sorted to Gryffindor.

G = student chosen for Gryffindor

B = they exhibit bravery

No (Group 3, negate sufficient)

Unless (Group 4, negate necessary)

so,

/G → /B

---------

B → G

According to contrapositive rules /G → /B is equivalent to B → G.

Isn't this a valid argument?

I assume conditional logic would mostly be relevant to logic games. Since logic games no longer exists, is it still necessary to focus on this?