What's the definition of madness?

[Dilbertian]

Something about trying the same thing over and over again, expecting it will work, even though the result is never different? But more pithily expressed.

Thought that was stupidity?

Repeating the same action yet expecting a different outcome?

"Insanity is doing the same thing over and over again and expecting different results."

Attributed to Einstein but almost certainly not him.

"Insanity is doing the same thing over and over again and expecting different results"
Apparently NOT said by Albert Einstein

Ha! Cross post

Yeah, eg: doing ww/sw/lchf/keto whatever diet for the bajillionth time because ‘it worked before’ even though it blatantly didn’t work in any meaningful sense because the excess weight has returned. Unless you take an exceedingly short term view of weight management.

Why almost certainly not Einstein?

@Dilbertian

Why almost certainly not Einstein?

It's one of those quotations which gets misattributed and that then gains traction, especially on the internet, where people just tend to go with the first google hit rather than cross-referencing it. For some reason, Maya Angelou has a lot of things she didn't say attributed to her as well.

The quotation on this thread has been fairly thoroughly researched and the Einstein connection debunked. Quote Investigator is a good site to turn to if you want to check a quote.