Not pretending to dig up fossils, just pretending that the ones they dig up prove the hypothesis or theory they are working on. Didn’t somebody make Nebraska man out of a pig’s tooth or something like that? Wasn’t “Lucy” found in pieces and put together using a lot of imagination? Weren’t the drawings showing the development of human embryos losing their “gills” proven to be a hoax even in the 19th century, yet they are still used in “modern” biology textbooks. There is evidence to suggest that some of the “evidence” is plastic. An interesting book is Buried Alive by Jack Cuozzo, a man who went to Paris to study the teeth in some of the skulls of Neanderthal Man and discovered they had been altered to look like the lower jaw stuck forward. I guess the best way to say it would be that they are trying to force the square peg of their imagination into the round hole of the truth.