[premise1]: Tenured faculty members(A) are all very politically conservative(B).
[premise2]: None of our better teachers are tenured.(not-A)
[conclusion]: None of our better teachers are conservative denying the antecedent.
[attack]: I think that this fallacy is denying the antecedent and this fallacy is “failure to see other reasons”. In this argument, we can see that A is a sufficient factor for B, but not a necessary factor. As a result, we can’t have the conclusion by denying the premise A.