In logic, "if not A, then not B" is equivalent to "if B, then A." That's what the contrapositive is - it has the same truth value as the original statement.
Perhaps I am being overly-literal here, but my failure is not one of logic.
Perhaps I am being overly-literal here, but my failure is not one of logic.
Kinda unrelated: Propositional logic is one of those things I wish we taught everyone in middle school. It's not that complicated, but it's such a powerful thing to have in your literary/rhetorical tool belt. I think a lot of young math nerds and writing/reading nerds alike would have appreciated seeing their worlds collide like this.