2005, Weiping Ye et al, “1,5,7-Triazabicyclo[4.4.0]dec-5-ene (TBD) catalyzed Michael reactions”, in Tetrahedron Letters:

It is not unknown for a logician to talk about exes and wyes.

But hundreds, perhaps thousands of artifacts have been taken by amateur pothunters, whose activities can disturb the soil and ruin the chance of serious research.

inborn talent