## Tree Tutorial 8 Modal Trees

###### 1/31/20

### Reading

Colin Howson, [1997] *Logic with trees* Chapter 12 Section 2

The Howson [1997] does not expand on modal logic (and modal trees) so a text like

Rod Girle [2000] *Modal Logics and Philosophy*

would definitely be a help here.

### Tutorial

[Modal logic is a vast area, what is being presented here is the briefest of glimpses through the shop window (a book like the Girle would help you go further).]