I've seen "tech" for "technology" but not for "technique". Interesting.
"Tech" is used in Sci*nt*l*gy jargon for the supposed mental technology that they claim to offer, and it raises my suspicions whenever I see it elsewhere. Specifically, the suspicion that the author is speaking in code to insiders, not for mere in-group fuzzies, but to communicate in plain sight of the outside world things that outsiders will not realise are being communicated.
ETA: There is now a third thread, so send new comments there.
Since the first thread has exceeded 500 comments, it seems time for a new one, with Eliezer's just-posted Chapter 33 & 34 to kick things off.
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