This is absolutely insane.
What possible proof could anyone produce that would allow us to conclude what life will be like on planet Earth in the year 2050? We can't even say with any certainty what the world will look like 10 years from now as artificial intelligence and robotics transform our society.
Climate researchers can create computer models and speculate about the future. But computer model projections are not established facts (something everyone should have learned during the pandemic).
The
only way to prove that predictions about life in the year 2050 were correct is to wait until the year 2050 to compare the observed facts with the predictions.
The people worrying about the great horse manure crisis in the late 19th century were right about the situation at the time. They were completely wrong about what things would be like 50 years later. That's because they had never heard of Henry Ford.
Even if it could miraculously be shown that the IPCC has been right so far (extremely doubtful), it wouldn't be "proof" that they're right about the future.
As I said, the future is unknowable.
(As an aside, I've decided to bookmark this post, so that it can be quickly retrieved when Frankfooter starts lying about the actual content. His blatant dishonesty and the abject stupidity of his posts are things that can be predicted with a great deal of confidence. You might say that when it comes to Frankfooter's bullshit, the science is "settled" ).