The choice between variants can be considered(examined) as the basic function of a way of thinking. How this task is carried out?

First of all, as there is a divergence between thinking and reality, one set of explanations will approach the given situation better, than another. Not all results are equally favorable; not all explanations are equally true. The reality induces to a choice and gives criterion, with which help the choice can be appreciated. Secondly, as our understanding of a reality is imperfect, the criterion of an estimation of a choice is realized by us not completely. In result the people not necessarily do(make) a correct choice, but, even if they have made a correct choice, not everyone consider(count) it(him) as those. Moreover, the correct choice represents only best of accessible variants, instead of best of all existing variants. The new ideas and interpretations can arise at any moment. They also can comprise mistakes, and, probably, from them it is better to refuse, when these mistakes become obvious. There is no final result, and only opportunity of gradual approach(approximation) to it(him). This implies, that the choice of variants represents continuous process of a critical estimation, instead of mechanical application of the fixed rules.