“What is truth?”
asked Pilate. We are still asking. There are now philosophical currents that
deny the existence of the truth, or the possibility of knowing it. Science,
however, aims at the discovery of truth, and the fact that technology works,
seems to indicate that the scientific discoveries of the last centuries, which
have made our technological advances possible, must represent, at least in
part, the truth about the world around us.
There are several different types of truth:
- Scientific truth: It is an incontrovertible
fact that there is a cosmic background radiation. But the theories we use to
explain its existence may not be true, or may be incomplete. Scientific
theories are validated in terms of the facts they predict or explain.
Thus, Einstein’s General Relativity
is considered closer to truth (or to reality) than Newton’s
theory of Gravitation, because the former explains the same
facts as the latter plus a few more.
- Philosophical truth: Aristotle’s hylomorphism may be debatable, but assertions such as something exists, nothingness does not exist, are indisputable. Philosophical theories are validated on the basis of the evidence of their axioms or starting points (as cogito ergo sum) and the validity of their reasoning.