jm {á1ÆjS5+/'Ç®u«Ä
_@2¹rKºLWhat if a payee accepted the 1st-seen tx as valid, relying on the fact that most nodes have also seen it first, and assuming miners enforce the 1st-seen rule?
https://whatsonchain.com/tx/ef6cc643302fd8ef3b812b30c9d91499402d07284c8c1f9a55a68086fffffde3