What a silly question, right?
I mean, who doesn’t know how to think? And can you actually learn to think, or is it just something that you’ve either got or you don’t?
I don’t know the answer to the last question, but I can help with the second one by a simple exercise.
It looks like this: why do you do, what you do?
Why do you spend money on X, and not on Y? Why do you exercise, or not? Why you speak in this way, or that way? Why do you react a particular way to a particular thing?
Are these behaviours, actions, statements and thought patterns the result of a conscious decision by you? Or do they just kind of happen?
So have you learned to think?
Or are you operating on autopilot, the simple accumulation of your life to date?