Numerous definitions of concept of truth affects only its separate sides, but doesn't penetrate into its sense. inasmuch classical definition of truth, in which the main criterion of truth is identity of thinking and beingness, rests against the fuzzy concepts "thinking" and "beingness" which yet should be brought into accord somehow.
Nevertheless, to truth anyway only consciousness can come, "having looked" at itself, at the surrounding and, further selecting subjects, to try to bring into accord with own intentions these subjects, most likely, changing them in own highest expression, than adapting of yourself under them.
Therefore truth in the course of cognition is always specific and depends on the level of knowledge and ability to put them, i.e. it is checked by practice, as a rule, and only limited is checked by favor so how seeming pragmatically superfluous and even unwanted for this moment of knowledge and skills can "flip" the world in the sequel, whereas the aspiration to benefit, to satisfaction of the desires, determined only by conviction (belief) is downfall of the person up to level of "consumption" only the useful that is similar to the animal adaptation to the environment instead of its conversion, and it leads eventually to degradation of the person. So that Pierce too narrows concept of truth: "A true proposition is a proposition belief in which would never lead to such disappointment so long as the proposition is not understood otherwise than it was intended” [6, p.242-257].
Another definition of "the father" of pragmatism Peirce pertaining to truth: “Consider what effects that might conceivably have practical bearings you conceive the object of your conception to have. Then your conception of those effects is the WHOLE of your conception of the object” [7, p. 331-346] proposes to take into account all "conceivably practical”.
Here, too, it appears a insufficiency of two types: the practical today may seem by one circle of things, tomorrow – another, that introduces uncertainty in the concept of the object, which also can be seen from an unexpected quarter – so appear inventions; besides, the practical is nevertheless mostly the useful, the utilitarian, excluding imagination, flight of thought, "mad" ideas, which are capable to change radically our life, and really changed it, especially for the last decades.