Two rules of thumb should guide your use of expert opinion.
First, if a claim conflicts with the consensus of opinion among experts, you have good reason to doubt the claim. Second, if experts disagree about a claim, you again have good rea- son to doubt it.
Slippery Slope Slippery slope is the fallacy of using dubious premises to argue that doing a particular action will inevitably lead to other actions that will result in disaster, so you should not do that first action. This way of arguing is perfectly legitimate if the