Okay, thanks.

I remember I was wondering about this point re Gödel’s theorem when reading in Martin-Löf’s lecture notes the piece where he emphasizes in great length that

true $\Leftrightarrow$ has a proof

which is of course the whole point of all of constructivism/ type theory. Still, put this way a Gödel-alarm bell tends to go off.

So it’s good to know how to switch that alarm off:

]]>true $\Leftarrow$ has

formalproof

Your definition of formal proof only works in a specific context, so I generalised it and then noted its implications for that context.

]]>I used to be very unhappy with the entry *proof*. Now I read Robert Harper’s little exposition *Extensionality, Intensionality, and Brouwer’s Dictum* and now I am happy. I moved some of this into the entry.

I felt that we needed an entry titled proof. I added something, but maybe somebody else feels like turning it into a genuine entry.

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