You could just remove the reward, any one can mine new block out of the mem pool, if two blocks or tx are in common, a determinstic algorithm could be used to select between the two.
Seriously you do not understand Byzantine fault tolerance and the FLP impossibility theorem.
If you want to add to my point of view, dont just claim I dont understand.
I am sorry but you don't understand. Your subsequent comments arguing with @dinofelis about checkpoints further confirms you have not studied the research I mentioned.
Please don't construct a Dunning-Kruger asshat for yourself. Just admit to yourself that you have not done the research. Its better to be honest.
If you want to build a réputation of the forum, please do it with someone else.
I hope you don't take it personally that I correct people when they are making factual errors and/or if it clear they are not knowedgeable about what they are writing about.
I expect others to do the same when I state errors. And
I thank them.