On 3/26/2017 1:22 PM, Bryan Bishop via bitcoin-dev wrote: > On Sun, Mar 26, 2017 at 2:05 PM, Peter R via bitcoin-dev > <bitcoin-dev@lists.linuxfoundation.org > <mailto:bitcoin-dev@lists.linuxfoundation.org>> wrote: > > With a tightening of the rule set, a hash power minority that has > not upgraded will not produce a minority branch; instead they will > simply have any invalid blocks they produce orphaned, serving as a > wake-up call to upgrade. > > > False. With bip9-based soft-fork-based activation of segwit, miner > blocks will not be orphaned unless they are intentionally > segwit-invalid (which they currently are not). If you have told miners > otherwise, let me know. >
A reasonable miner automatically checks every transaction seen, to see if it might be valid with his own outputs substituted.
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