I *am* simply interested in very many subjects.  My different excursions into these varied subjects can be found in the headings in the menu above.  I cannot claim to have any formal and accredited knowledge in all of them, hence the “Lay”.  At the same time, I do think about these subjects quite a bit and my understanding of them is generally more than surface knowledge, hence the (hyperbolic, and only subjectively deserved) “Peritus”.