This thesis of Coady also is refuted by the same the principle of the refutation of the thesis of Hume with respect to the verificacionismo. Thomas Reid refutes the idea of Hume affirming that he is possible to get knowledge through the certification, with two arguments. The first argument, affirms Reid, that the fact of the man to say the truth, if must to the fact of that this attitude, is an innate attitude of each man. Second it is the trend that we have to believe, first, in what the others say. In fact, Thomas Reid possesss a Rousseauniana vision that the man is born ' ' bonzinho' ' therefore ' is innate of this man; ' bonzinho' ' to say the truth and to believe the truth. if the man, in accordance with Thomas Hobbes, is born bad? It will be that it would have this same trend of speaking and believing the truth first? It is concluded then that if really the credibility of the knowledge through the certification was possible not, with certainty, would not have reasons of terms facultieses, schools and university, for example, therefore we would not believe the professors and etc. Being thus, the credibility of the certification, mainly when happened of sciences, it tends to be accepted, why we do not have to accept it forcibly, but yes why sciences, the institutions of education, among others, or possess better explanations if comparative to the religious explanations, for example, or its explanations have a bigger probability to be truths if comparative with the credibility that we could give the religious ones, for example. REFERENCE HUEMER, M., Epistemology Contemporary Readings, Edited by Michael Huemer, with an introductio n by Robert Audi, London and New York: Routledge, 2002. 1Em this text on ' ' Aquiles and tartaruga' ' , Carrol demonstrated inferncialmente, that in all deductive system, has an implicit premise not demonstrated and that it takes the reduction to the infinite..