Things are only tropes if they happen more often in fiction that in reality, so to detect them you need an accurate map.
ETA: And everyone is already in hole-picking mood. So any cognitive biases showing up will be jumped on.
ETA2: What does ETA stand for anyway?
ETA = Edited to add (not "estimated time of arrival", the more common usage)
I sometimes use ETC, edited to correct, but that hasn't caught on.
ETA: And here's the LessWrong acronym list -- we need to link it from the front page.
This is our monthly thread for collecting these little gems and pearls of wisdom, rationality-related quotes you've seen recently, or had stored in your quotesfile for ages, and which might be handy to link to in one of our discussions.