Answer: A philosophical view holds that (1) it is possible to obtain knowledge
or reality by reason alone, unsupported by experience and (2) all human
knowledge can be brought within a single deduction system. The early
rational and those who follow lay out a system of logical reasoning that is
still very much arrive in modern psychology as part of its experiment
methods. Observe a phenomenon, then, deduce what might have caused it
and also what follows from it. Deduction is reasoning from the general to the
specific.