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Cocktail Ideas vs. Deep Ideas

danluu.com

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Dan Luu on the difference between ideas that sound smart at a party and ideas that actually hold up under scrutiny - with examples from tech, science, and business.

Made me realize how many of my opinions are cocktail ideas - things I repeat because they sound good, not because I've actually verified them. The section on Goodhart's Law in tech is devastating.

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heliaCurator·248 rep·3/18/2026

The '10x engineer' myth is a perfect cocktail idea. Everyone repeats it, nobody can define what it means, and the original study it's based on doesn't say what people think it says.

siddharthexpertExpert·672 rep·3/18/2026

Dan's meta-point is the most important: we should hold our beliefs more loosely. Most of what we 'know' about tech, management, and productivity is cocktail knowledge that hasn't been tested.