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Alice could send her 1 XBTC to her address A on the XT-network and her other address B on the BTC-network. ...
Note that it really doesn't make sense to talk about 'address x on the y-network' absent a change to make formerly legal addresses illegal or vice versa. Such changes are possible and may be used as tools/weapons when the battle warms up, but that has not been discussed much and is not part of the current conversation.
Also be clear that re-playing a transaction on 'the other chain' (I would anticipate 'the other chainS' being more relevant) does not necessarily do anyone any good unless they control the keys on the recipient end of things. It is, of course, trivial to send transactions to oneself so that both the sending and receiving keys are controlled and that will be how clued-in people 'double up'.
Should be a lot of fun to watch. I guess it's a good reason for people to learn a little more about how Bitcoin actually works.
Yes! That would be very wise indeed.
The cloudy period between both chains will come (in my view) if XT nodes hit the ~50% consensus mark. At that time some merchants/users may be confused as to which chain to accept bitcoin payments on for goods and services.
Will definitely be interesting to see how things work during that "adjustment" period.
No one really knows how long the adjustment period will take.
It is possible that the % could go from 49% -> 50% -> 51% -> 49%...in that time that makes things interesting as it crosses that threshold.