[garydevenay]

The rules of the Bitcoin network are not validated by miners, they are validated by nodes. The miners have no control over nodes and unless their mining work is accepted by the consensus rules of the nodes they receive no mining reward.

[marshray]

> On 21 July 2017, bitcoin miners locked-in a software upgrade referred to as Bitcoin Improvement Proposal (BIP) 91

> By 8 August, another milestone was reached when 100% of the bitcoin mining pools signaled support

https://en.wikipedia.org/wiki/SegWit#Activation

[tylersmith]

That's signaling, built into the end users fully-validating nodes, to coordinate between the miners producing blocks and nodes validating them. The validating nodes are the ones that offered up and then accepted the signaling.

[garydevenay]

Signalling is not consensus I’m afraid…

[Spivak]

Miners and nodes have to be in agreement, when they're not you're right they've essentially fork BTC but I think you're wrong about who really holds the power and which chain would end up being the authoritative one after such an event.