[tyuu]

Any advice that you both understand and fits perfectly into your mental model is probably coming from whatever dogma you already follow and is therefore useless.

Any advice you don't understand is, of course, useless.

Any advice you do understand but doesn't fit into your mental model will just get rejected.

“I always pass on good advice. It is the only thing to do with it. It is never of any use to oneself.” ― Oscar Wilde

Although certain "advice" is actually SOP, in that case it is good to know (like stop, drop, and roll).

[derangedHorse]

> Any advice that you both understand and fits perfectly into your mental model is probably coming from whatever dogma you already follow

I don't know what you mean by "fits perfectly" into one's mental model, but one can certainly accept new information validated against their own understanding of the world. People don't put an equal amount of weight in each of their beliefs and there are axiomatic ones that can be used in logical arguments to disprove the inconsistencies of others.