In logic there is no side by side, there can be no classification.
In logic there cannot be a more general and a more special.
5.4541 The solution of logical problems must be neat for they set the standard of neatness.
Men have always thought that there must be a sphere of questions whose answers - a priori - are symmetrical and united into a closed regular structure.
A sphere in which the proposition, simplex sigillum veri, is valid.