Hi Pieter,

I believe Gavin plans to write a blog post about the hard fork process, but I'd like to debate this with you now, if only to give him material to work with :)

Your points look to me like the hard/soft fork debate in different clothes.

For example, we all agree that the rules of Bitcoin can be changed, and have been before (e.g. P2SH), with software upgrades.

When such a fork happens, any user who does not upgrade their node isn't fully verifying the block chain anymore. Their software might think it is, but it's running NOPs that don't mean NOP to other nodes. So there is a divergence in the consensus, it's merely been done in such a way that the node won't stop and print "hard fork detected" to the logs. It'll happily accept a block that violates the new rules, then wait to be corrected by miners.

So with any fork, hard or soft, there is risk to those who don't upgrade. They may accept a block, or even two blocks, that they believe are valid according to their old rule set, but which other miners would reject. The effect on double spending is much the same.

Now let's talk philosophy.

* Philosophy: Bitcoin is not a democracy.

This appears to be a key point of dispute. Bitcoin is a democracy, though the analogy is not perfect. You can certainly believe whatever you like about the true state of the ledger, but rubber hits the road the moment you go and trade with other people.

If 90% of the people you trade with believe a coin exists, and you don't, you're gonna discover you keep getting paid with that coin and its descendents. You may hate it, you may feel your rights are being violated, you may refuse to trade with those people but it will keep happening.

Money is about trade, and trade inherently involves the decisions of other people. No man is an island.

With Bitcoin we have a great way to quickly find out what other people believe about the ledger. If the vast majority of people are on ledger A and you're on ledger B, then you've got a strong incentive to come into line with the majority in order to keep trading.

Changing the rules should be possible if there is wide consensus, but nobody should feel forced to change their code against their will.

Nobody, not even after a hard fork, is forced to change their code against their will. It may be something that other people require as part of trading with them though. Whether one considers this "forced" or not I guess can be argued either way. Are you "forced" to buy oranges from the single orange seller in town if the other goes bankrupt, or could you just avoid oranges? Where does economic freedom begin and end?

* Governance: being able to push for a controversial change to the system sets an incredibly dangerous precedent about who is in charge of the system's rules.

I think it's surely the opposite - not being able to push for controversial changes sets an incredibly dangerous precedent. Namely, whoever gets to decide that a change is controversial gets to veto anything they like!

I can promise you that I will say anything in mail to this list if someone points a gun at me

Indeed, me too! But it's worse than that: what if someone sockpuppets a discussion to make it look like a change does or does not have consensus?

One reason I keep banging on about process and how Wladimir needs to be The Decider is that the current attempt at "process" is so vague, not only is it unexplainable, but it's wide open to manipulation.

Good thing we have a way to resolve this problem: the block chain. Now it doesn't matter if someone points a gun at you or me. We can object to whatever we like and that wouldn't bring Bitcoin to a halt, thus removing the incentive to try and pressure individuals.

But if we don't have that ability to vote through choice of software and rulesets, then us poor developers really are in charge and that's not a place any of us should want to go. There must be a mechanism for people to disagree with the consensus, even in major, controversial ways, and that mechanism must have real force to it.