Not a palindrome. Reduplication. :)

@AlanMunn Congrats! :)

@PauloCereda Also on the big screen ^^^

@Werner That's exactly what I was wondering (I downvoted it, btw)

@DavidCarlisle Seen the TeX Live mailing list issue re. \undefined and pdftex.def?

@AlanMunn a square :-)

@yo' On the contrary, it is square free! Prime decomposition: 7·11·13·137. That 1001=7·11·17 is a curious fact, little known.

@HaraldHanche-Olsen a square-free square :-)

@AlanMunn In a novel by L. Sciascia (Il giorno della civetta, The day of the owl), the mafia boss calls quaquaraquà one of the categories he divides men into (ducks are involved, of course).

@JosephWright Reading the old thread I wonder if it isn't time that the code of supp-pdf.mkii wanders properly into latex. I doubt that Hans wouldn't allow it. You could replace every \ifx\XX\undefined by \ifundefined\XX and load it if etex is used ;-)

@JosephWright @UlrikeFischer Ever tried looking for \undefined in LaTeX packages?