This does not make sense because Group Four Conditional means that you negate either and make necessary, in the case of the exampe he did the necessary part correct, but since there is a no in the beginning of of ansswer d. there should be a / before Indy. So therefore,

/Indy--->/Fish or Bird

HELP: So is it just what comes up first in the passage that dictates if the situation is a "Most before All" or "All before All"???

question isnt making sense, it should be a most before all shouldnt it

the fact that a different person is answering this and not using the concepts we just covered is very confusing

Was the F--->F to /(D-->F) turns into D <-S-> /F not taught anywhere before this???

wasnt it said earlier that "some" cannot have a contrapositive? or is negation different

Question one does not have "unless" as the indicator, it is "without"

Really glad this lesson is here, saves me a lot of anguish and wasted thinking