One of the characterizations of his I didnt like was that he would write that so and so had proved something...cuz the math worked out....no physical test ....just math..still a smart guy...but there are many smart guys
Stephen McIntyre and Ross McKitrick found a mathematical flaw in the computer program of “Hockey Stick” fame, which when fed garbage files of random numbers would always produce a sudden upturn at the end of a representative graph. This was Mann’s ‘talking-point’ per evidence for a sudden surge of global warming based upon a computer program’s manipulation of tree ring growth, analysis purported as representative of temperature trends.
Way too much science is accepted based on mathematical models as the proof. Any science which requires different fudge factors depending upon at what scale the universe is examined, deserves re-evaluation from first principles, regardless of utility of current methods to get the answer sought after.