Straw Man

Special pleading, or ad-hoc reasoning

An argument in which a dispute introduces or excludes details by saying that additional considerations that do not have proper criticism are needed
Ex "Cocaine use should be legal. Like all drugs, it does have some adverse health effects, but cocaine is different from other drugs. Many have benefited from the effects of cocaine."

A weak or imaginary opposition (as an argument or adversary) set up only to be easily confuted
"A: We should relax the laws on beer.
B: No, any society with unrestricted access to intoxicants loses its work ethic and goes only for immediate gratification."