Appeal to nature
"It's natural, so it's good"
Hume's law (from is to ought)
Deriving a norm from a fact
Appeal to tradition
"It's always been this way"
Appeal to popularity and normality
"Everybody does it"
Appeal to authority
"So-and-so said it or did it"
Arbitrary criterion (speciesism)
An irrelevant trait chosen as the moral boundary
Persuasive definition
Defining the term to win the argument
Begging the question
The conclusion is hidden in the premise
Continuum fallacy
No exact line means no difference
Hasty generalization from an exception
An exception used as the rule
False dichotomy
Either this or that, with no third way
Nirvana fallacy
If it isn't perfect, it doesn't count
Ad hominem and poisoning the well
Attacking the person
Guilt by association
Linking the idea to something hated
Priority fallacy
"There are more important things"
Anecdotal evidence
One case against the data
Cherry picking
Selecting only the favorable data
False middle ground
The truth is always in the middle
Changing the question (red herring)
Swapping "is it wrong?" for another question