1900 missing premise class notes:

students seemed restless and bored, maybe because it was kind of hot and stuffy.

noticed that part of what's unnatural about some of the arguments is that the mental inference being made is larger than we would make conversationally.

the most natural examples are combo sentences with an unspoken premise bridging the gap.  should probably rewrite reading beginning with those, and have problems in those first (currently the D problems from 1.10.1).

(the challenge in that case might be finding natural-sounding arguments big enough to even motivate the other requirements -- particularly the no useless sentences requirement.)

