On the other hand, it is not possible that any æstheticism, empiricism, mathematicism, philosophism, mythologism, or logicism whatever, should remain limited to a determinate philosophic concept without coming in contact with others, because those forms of error strike at the logical form of thought itself, and therefore equally at all other philosophic concepts. The ethical or æsthetic empiricist, for instance, must logically affirm a general philosophic empiricism if he does not wish to correct himself by contradicting himself (an hypothesis which must be neglected and left to be understood in this consideration of the simple, elementary, fundamental, or _necessary_ forms of error). He who in a particular philosophic problem has committed a confusion of concepts, and has thence arrived at a particular scepticism and mysticism, is led by the systematic and unitary character of philosophy to widen that mysticism and scepticism from particular to general. From this general mysticism and scepticism, he is led to return gradually to mythologism, philosophism, empiricism, and to the other negations of the logical form of philosophy. Everything is connected in philosophy and everything is connected in error, which is the negation of philosophy. [Footnote 1: _Proslog.,_ c. 18.] VI THE ORDER OF ERRORS AND THE SEARCH FOR TRUTH [Sidenote: _Necessary character of the forms of errors. Their definite number._] Everything is connected in errors; error has its necessary forms. This implies, in the first place, that the possible forms of errors, the logical forms of the illogical, are _so many_ and _no more._ Indeed, the forms of the spirit or concepts of reality, which can be arbitrarily combined, can be stated as a finite number (where the process of numbering can be applied to them). Consequently, the arbitrary combinations or errors which arise from them can also be similarly numbered. Only the individual forms of error are infinite, and that for the same reason which we have already given, as the individual forms of truth are infinite. Problems are always historically conditioned, and the solutions are conditioned in the same way; even false solutions, which are determined by feelings, passions, and interests, also vary according to historical conditions. [Sidenote: Their logical order.] In the second place, and as corollary to the preceding thesis, the possible forms of errors present a necessary order; and this, because the forms of the spirit or the concepts of reality stand in a necessary order to one another. They cannot be placed after or before one another nor changed at will. This necessary order is, as we know, a genetic order of degrees, and consequently the possible forms of errors constitute a series of degrees. It is commonly said that _error has its logic,_ and we must say more correctly, that it cannot constitute itself as error, save by borrowing logical character from truth.