I must have done quite a thinko, but I don't remember leaving my keys in the refrigerator.
1998, K. G. Binmore, Game Theory and the Social Contract, Volume 2: Just Playing, page 34, We need to face the fact that thinkos are likely to be much more important, even though such a source of noise is much harder to model.
3 more examples
Spell-checkers can help with simple types such as misspeIIings and repeated words, but they are little defense against the equally common "thinkos," such as the inconvenience/incontinence example above. Your only defense against thinkos is a careful read.2006, Kristen B. Donohue, “Misused Words and Other Witing Gaffes: A Manager's Primer”, in Written Communications that Inform and Influence, Harvard Business School, page 164:
I don't know about you, but I don't want to grovel through a bunch of code blocks to track down a typo or thinko.2008, Kurt Wall, Tcl and Tk Programming for the Absolute Beginner, page 134:
There are two kinds of linguistic missteps, the typos and the thinkos. Typos are the processing glitches that intercede between a thought and its expression. They can make you look foolish, but they aren't really the signs of an intellectual or ethical deficiency, the way thinkos are.2009, Geoff Nunberg, Going Nucular: Language, Politics, and Culture in Confrontational Times, page 59:
thinko
verb
Etymology From think + -o, on the model of typo (“typographical error”).