Most geo's who are involved the lab selection and tender process...

Most geo's who are involved the lab selection and tender process visit the labs and tour and audit their facilities, processes and workflows. So you'll find that many geo's have a good knowledge of the workings of the labs.

Aircore bits commonly can chip and break during drilling when encountering very hard rock, be it either thick veining, silicified or ferruginised intervals or plain old fresh rock. No one other than you is invoking drillers shaving drill bit into the samples. That's ludicrous. Why would they try and fake a W-Co anomaly of all things?

You really do not display a good working knowledge of exploration. Have you heard of the Dunning-Kruger Effect?