Why Stop With Descartes' Second Mediation?

Here's a topic that I'll flesh out more fully in a fuller-length piece in my Medium site, hopefully later on this week - something that came first as a complete surprise to me, and then transformed into understandable dismay:  apparently, it is quite common for philosophy instructors to assign and teach only the first two of Rene Descartes' six Meditations on First Philosophy .

I discovered this when posting my recently released core concept videos focused on that very work.  Pe...