You've pointed to 'many' countries and also to laws stopping this. Now you've evaluated likelihood. Since you were able to drive a likelihood calculus, what specific laws were you calculating against?
Thanks for the deets. Do you know if UK has courts that handle people who sue one another? It looks as if you can file suit against the UK government. I'm genuinely curious, has someone with evidence of ownership sued the British Museum?
I can see a compelling argument someone might claim ownership of the stone, I'm curious where in the process they were shut down, if they didn't try, or they did and their suit was dismissed.