There is no conclusive evidence for either explanation. A closely related question is what counts as a good scientific explanation. Abductive reasoning allows inferring formula 2 as an explanation of formula 1. An argument is not an "explanation". What is the explanation for this phenomenon? Many references in the text lack explanation. A brief explanation of each follows. There is no consensus explanation for its purpose. According to explanation given in Law no. In the absence of a firm etymological explanation, alternative theories abound. One proposed explanation for this is the handicap principle. There are three theories for the explanation of blindsight. The Phillips curve started as an empirical observation in search of a theoretical explanation. There are, however, a variety of problems with that explanation. Arguments in support of a genetic explanation of racial differences in IQ are sometimes fallacious.