For the question "How does one acquire knowledge?", I recommend Kant, Hume, Russell, Carnap, and Popper, for a start. I'd like to ask you how you find out if a

For the question "How does one acquire knowledge?", I recommend Kant, Hume, Russell, Carnap, and Popper, for a start. I'd like to ask you how you find out if a question is meaningful? And please don't answer "if it can be answered by science", because then you have a circular argument.