Make an appeal to scientific authority. Doctor Jones said so, and he is an expert, so it’s true. Experts can do anything. Doctor Jones is a world leader in phrenology, so you should allow him to examine the lumps on your head. In fact, you should invite him to make a few more lumps. Here’s a hammer that Doctor Jones may find useful. This appeal is like the bandwagon argument, but with a bandwagon of one. A proper scientific argument could be: this meta-study reviewed medical research into the claims of phrenology, and found evidence (or no evidence, or whatever) to support Doctor Jones’ claims. You might guess that such a study would be boring. You would be correct. So just refer to the expert and let him sway your gullible audience.