You need to realize that the only thing a career academic can really teach you is how to be a career academic. - Nassim Nicholas Taleb

Psychologists use "IQ" to politely put people & entire races in boxes with the label "idiots", and stick them there for a lifetime. They ruin people's careers and potentials. Politely. I call psychologists (& IQ mountebanks) idiots to their face. Not politely.

Popper introduced the mechanism of conjectures and refutations, which works as follows: you formulate a (bold) conjecture and you start looking for the observation that would prove you wrong.

Linear relationships are truly the exception; we only focus on them in classrooms and textbooks because they are easier to understand.