If our case 14c) troubles you, you may be inclined to say: “But why did he bring just this bolt of material? How has he recognized it as the right one? What by? ‒ ‒ If you ask “why”, do you ask for the cause or for the reason? If for the cause, it is easy enough to think up a physiological or psychological hypothesis which explains this choice under the given conditions. It is the task of the experimental sciences to test such hypotheses. If on the other hand you ask for a reason the answer is, “There need not have been a reason for the choice. A reason is a step preceding the step of the choice. But why should every step be preceded by another one?”