Gabriel Andrus

A brief overview of the system S5 in modal logic as defined by Brian F. Chellas, author of "Modal Logic: An Introduction." The history and usage of modal logic are given mention, along with some applications. Very much a draft. Written for PhileInSophia on July 5, 2021.

This short essay seeks to provide opinions on the moral definition of goodness and its various implications using examples coined by philosopher Thomas Nagel.