I am a cosmology layman. Have been an engineer most of my life, but I'm now technically retired. My work as an engineer, took me into safety audits, logic and logic scenarios, with regards to, the design of,the running and safety control, of industrial plant. Working with many companies such as the Admiralty, BP, etc. Logic scenarios entail, using logic to break down the individual actions/options involved in an action path, and seeing if any of these, can be replaced, to make a better action path. I've always had an interest in space, astronomy, cosmology, etc, but only in the past year, have I got deeper into that interest. I have a personal retirement project, to apply these logic principles, to look at the many actions/options, in some cosmology paths. It will probably come to nothing, but who knows. It keeps me happy.