Then you can correlate PPM of CO2, with deltaT?
Rhetorical question.
No you can't.
Rhetorical question.
No you can't.
Hypothesis does not equal theory.
Anthropogenic climate change is a verifiable theory.
Of course it is impossible to give 100% probability of the future.
We have to theorize based on historical evidence and knowledge of climate factors, however limited.
Eventually we reach a conclusion which , while maybe imperfect, reached a confidence interval that is beyond reasonable doubt.