[naniwaduni]

> Who cares what the conventional wisdom says? The psychometric results are that SAT I scores and SAT II scores predict performance about equally well in isolation and don't have more predictive value in combination than they do in isolation. In other words, they measure exactly the same thing.

This is point where you take a step back and conclude that if this is your measured result, you may have been measuring nothing at all.

[thaumasiotes]

Did you miss the first part?

> SAT I scores and SAT II scores predict performance about equally well in isolation

They're both good predictors. They're just the same predictor twice, as opposed to being two different predictors.