On Sep 11, 2015 12:27 PM, "Dave Scotese via bitcoin-dev" <bitcoin-dev@lists.linuxfoundation.org> wrote:
>
> Rather than (promising to, and when they don't actually, at least pretending to) use the first-seen block, I propose that a more sophisticated method of choosing which of two block solutions to accept. 

There's already a criterion to chose: the one with more work (in valid blocks) on top of it.