Thinker (revision 2)

[dukealien]

The comb is not     I'm normally down on "the," but in this case you're talking about the Platonic ideal of the comb - so it works
a critical tool in your kit,
evidently.    Placing "evidently" here rather than before "not" gives a supercilious air which may not be intended.
I cannot characterize you
as trying not to try.     This couplet is a bit opaque to me - I translate it as "too out-of-it to even be called 'not trying.'"  It does work to build up the nature of the viewpoint character, i.e. the speaker.

Deficient of intent,
you are

sincerity in thick brown
tress and wrinkled knit,    "tress" is an odd (and attention-getting) word choice.  One braid, one lock?
as though, complete
with scribbled thought,
you pulled a napkin    would like to see the napkin described a bit - "wrinkled" or the like
out of pocket     for some reason I pictured the subject as female up to this point, but "pocket" rather than "purse" suggests male
and stretched it overhead
to wear.    captivating image (especially if male, so swings the thought back to female) but an odd way of suggesting a thought balloon in real life.  Can't quite make sense of it.

In mild critique (hope this is not overboard) the word-picture of the intellectual or pseudo-intellectual ditz is well drawn.  Equally well, if not better, is the mean-girl viewpoint character reflected in use of words, inverted constructions, and what seems to me hidden contempt.  If this were written, it would be on a note passed around in class and everyone would know to whom it referred.  Or, I guess, a txt these days except it's too polished.

Summary:  Describes an unpleasant situation well.  Some parts are jarring, suggest looking it over to see where it could be smoother but also with the thought that the harshness is meant to be.

Liked it, in the way one likes a sour pickle:  good of its kind.