I did not catch "at-home" in my haste during the PT.

On question 4, not sure how we can make the jump that "the muralistS (plural) would agree" from the passage only telling us that one artist borrowed techniques from other cultures.

I feel like I am doing these principle problems without relying on lawgic. Is this just because I am working on principle problem set 1 and the problems are just easier? How prevalent is lawgic on principle questions?

This is a classic LSAT Part to Whole comparison. Whenever you see a part of something being used to make assumptions about the whole, keep your eyes peeled for an answer that addresses this.

Great advice.