4 ms·A double spend isn't an invalid block. This renders the rest of your argument invalid.by freeloop2 9y agoA double spend isn't an invalid block. This renders the rest of your argument invalid.tboyd47 9y ago> For each input, if the referenced output has already been spent by a transaction in the main branch, reject. https://en.bitcoin.it/wiki/Protocol_rules https://en.bitcoin.it/wiki/Protocol_rulesfreeloop2 9y agoThat isn't a double spend!