That's philosophy just in general though. It's to a very large degree the study of excerpts, and commentaries excerpts, and commentaries on commentaries.

There are people with a degree in philosophy that think Plato's republic was an attempt at designing the ideal state, because they've only seen the middle of the dialogue, and were never shown the beginning and end where the republic is very explicitly introduced as a philosophical device to examine the virtue of justice in the soul.