Guy tries to double spend a 1000 dollar gift card

its safe, as i understand it, because all miners are at most two hops away from each other, so there is an infinitesimal amount of time between when you submit a transaction and when it propagates to all miners. also because there is no replace by fee, and because blocks will never be full, once you submit a transaction miners immediately start trying to place it in the next block. combine this with a merchants running their own nodes to listen for a few seconds to make sure what you describe doesnt happen, and they basically have all the safety they need. my uneducated belief is that its probably more accurate to describe 0conf not as instant transactions but more on the order of a few seconds.

replace-by-fee is optional in BTC and must be flagged, so that would mean zero-conf without RBF flag is just as safe for BTC as it is for BCH

so as long as the merchant only accepts non-RBF transactions with sufficient feeds for zero-conf they'll be fine

*fees not feeds

dunno

>because all miners are at most two hops away from each other
Proof?

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corecucks can't handle the truth

Are corefags irreversibly BTFO at this point?

i expect craig to talk about this at the conference next week; its something that he's been tweeting a lot about lately.

>because all miners are at most two hops away from each other
>Proof?
Bitcoin is a small world graph network meaning that everyone is connected through the miners. It's like how the six points of contact game works where you say you are six points of contact from any other person in the world. In any graph network where there are many decentralized hubs throughout the network, so long as the decentralized hubs connect together then the distance between any two points in the graph is very small.

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This 100%