Checking my work with the assumption I made mistakes is distinct from knowing that 2 of the 5 answers are wrong, and therefore my expected value of a guess is positive vs. when i cannot eliminate any. Saying that checking your work and knowing some answers are wrong but not which one is right are the same thing is simply not true.
Way to ignore the last sentence of my comment. I consider the guess to be separate from the process of elimination that precedes it and sometimes obviates it.
