"All this criticism is valid and long overdue. But the biggest scandal in the IPCC's closet remains its 1995 claim to finding a “discernible human influence” on the earth’s changing climate. Lead author Ben Santer of the Lawrence Livermore government laboratory inserted those words—after the IPCC’s consulting scientists had signed off on a draft that specifically said no such “human fingerprint” had been found!
Santer deliberately reversed the meaning of the whole IPCC 1995 report—and the trajectory of every IPCC document since. He claimed the rewrite was justified by two of his own studies. However, Santer’s papers “cherry-picked” the earth’s temperature record from 1963–1987, ignoring the earlier and later temperatures that didn’t confirm the Greenhouse theory! Thus the IPCC’s whole claim of a “discernible human influence” remains without scientific support to this day."