you think that's bad? you should read Hans Kamp's 1981 paper (A Theory of Truth and Semantic Representation) introducing discourse representation theory in which:
"u" and "U" are both used and have different meanings. "m" and "M" are both used and have different meanings. "v" is used, though I didn't see "V". "k" and "K" are both used and have different meanings. and the typesetting has the empty set symbol indistinguishable from greek letter phi, which sometimes occur in the same formula.
I should also note, he was in no way running short of other letters to use. There are whole chunks of the alphabet entirely unused by him.
oh, also, 's' and "S", again, both used, different meanings.
no subject
"u" and "U" are both used and have different meanings.
"m" and "M" are both used and have different meanings.
"v" is used, though I didn't see "V".
"k" and "K" are both used and have different meanings.
and the typesetting has the empty set symbol indistinguishable from greek letter phi, which sometimes occur in the same formula.
I should also note, he was in no way running short of other letters to use. There are whole chunks of the alphabet entirely unused by him.
oh, also, 's' and "S", again, both used, different meanings.