1 2016-08-15 23:37:13 <achow101> Since a public key can be retrieved from a signature, why not have the scriptsig (or witness) not have the pubkey there but rather get the pubkey from the sig and check that it hashes to the hash160 of the output?
2 2016-08-15 23:44:56 <achow101> something like what sipa talked about here: https://bitcointalk.org/index.php?topic=6430.msg93940#msg93940v 5 years ago