What it would be Really? Far from trying to base one, only the proposal presented here would be a reflection concerning the subject and some presented nuances being of illustrative form. Since remote times that if the famous truth searchs, we can cite the Philosophy of Old Greece, going of the daily pay-socrticos until our society contemporary, thinking, for example, in a Claude-Lvi Strauss. Passing for diverse theories that deny or look for to validate the call truth, being that the proper negation is an affirmation of the negation and the affirmation a negation of the refusal, also with all a systematization to look for to take care of the two opposing proposals. We can in sending to the misticismo and the search to them for an inconceivable, absolute truth and undisputed, what a Metaphysical construction would regimentaria all, but also it can imagine Parmnides and all an empirical experimentation that converges to the truth to what it is, being that this ' ' ' ' if it relates what exists and we can contemplate, although exactly the Metaphysical can use an argument on the abstraction to exist in the abstract field, being able even though to arrive in the truth that is reached by the cognitivo method of an individual. Clearly that the materialists could urrar, therefore they would atrelariam the true what is concrete and consequently subjecting the abstract to a previous experience, a quarrel that can last without becoming fertile, in view of not the resolution and the propagation of speculative and mere fugidias conjecturas to a systematization. Here we adentramos the scientific truth, that one that is from the moment that I can systemize and prove, beyond as ' cites Weber in its workmanship; ' Science and Politics: Two Vocaes' ' , to foresee, or to foresee, not being associated to no prophecy, but yes to a logical set of probabilities.