causal claim
The development of tactics made Lean more powerful and began to reduce the difficulty of writing proofs in it.
Unresolved speaker · Mathematics Just Changed Forever — Kevin Hartnett · 26 Oct 2026
In their words
The transcript segments this claim was taken from
“That becomes one way in which Lean becomes much more powerful, and this pain of writing proofs in Lean starts to diminish.”47:05Report a misattribution
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