Why not? A 20 digit long string of numbers is a perfectly valid visibleID. It corresponds with the visibleID of 1e+58 other accountIDs
Are we all talking past each other here? Are we all even talking about the same thing???
When someone else enters a passphrase that gives already used account they'll see a big red message saying that this account can't be used.
Is this a new feature?
Also are you talking about only if 2 different passphrases accidentally generate the same account. What about if 2 people use the same passphrase?
no hes not talking about 2 different passphrases generating the same private key (because then they share the same public, account, and visible ID) in effect those 2 particular passphrases ARE the SAME EXACT accounts, same thing if 2 people use the same passphrase
What we are discussing are results from 2 different sha256(PUBLICKEY) operations where 2 different public keys generate different accountIds but their 1st 64bits are the same