Appeal to Ignorance
A subclass of the faulty appeal to authority. It refers to the fallacy of saying that something must be true simply because an expert says it is. However, even experts are occasionally mistaken, so their opinions should not be taken as unquestionable. This is especially evident in cases where other experts in the field disagree. Just remember “For every expect, there is an equal and opposite expert“. No mere human knows everything, and therefore we should never simply accept a claim as infallibly true if it is simply the opinion of a fallible expect.