The ultimate test of the hypothesis about the possible impact of the forcings is how well the observed data compare with the predictions. The reality remains that the predictions have been consistently and spectacularly wrong.
The models don't understand the climate.
The hypothesis was proven definitively when the theoretically predicted radiation exactly matched the hard physical observation.
Your entire argument here is a fallacy. You claim that because there are additional unknown factors that impact climate that no theory about climate is true. That is absolutely asinine to begin with--a very stupid argument.
But in any case we have hard, definitive science published in the most respected scientific journal that definitively proves, beyond any doubt, that greenhouse gases cause warming.
Please don't blither about the models being inaccurate. That just means there are other factors in addition to the proven warming effect of greenhouse gases. Trying to make anything more out of it is innumerate.