Why do even seemingly smart sometimes flunk on the SAT tests anyways?

Question

So,what is it precisely the SAT suppose to measure. Is it anyway scientific?

Answer 1

SAT measures reasoning (not knowledge) vs. ACT (which measures knowledge)

Answer 2

The only thing that the SAT measures is how likely a student is to be successful during their first year of college.  It leaves out so many factors, too.  Smart people perform poorly on the SAT for many reasons: test anxiety, weak analytical skills, and lack of knowledge of the subject material.