Student or Learner
a. He chose me because I am fast, not strong.
b. He chose me because I am fast, not because I am strong.
Can we tell if the speaker is strong nor not?
Aren't both sentences somewhat ambiguous in that regards?
I think Rover is saying that just because the sentences don't clarify whether you are strong or not, that doesn't make them ambiguous, because strength is not an issue. I agree.