Stool or Chair: Where is The LINE!?

In my household we regularly hold ridiculous debates. Our current one is where exactly is the line between a chair and a stool?

We begin by attempting to define them of our own accord to see if we agree. When this fails and words cannot be agreed upon, we google definitions for a reputable source to define each individually and attempt to find a line we can agree upon... and when this fails, we devolve into extreme exceptions to the other person's definitions.

Chair vs. Stool

Google defines a chair as follows: Noun,"a separate seat for one person, typically with a back and four legs."

Google defines a stool as follows: noun, "a seat without a back or arms, typically resting on three or four legs or on a single pedestal."

This brings us to the discussion of the where the line is. Can a seat be both? there may be two lines: chair, chair-stool, and stool. The use of the word "typically" in both definitions is really what is throwing us with this discussion: the word "typically" allows for so many exceptions to the "rule" we are attempting to define.

Help Us Decide!

Where is your line? When is it a chair? When is it a stool?