Unlike Quirrell, Penn Jillette is not referring to "knowing in your heart" that your moral values are correct, but to "knowing in your heart" some matters of fact (which may then serve as a justification for having some moral values, or directly for some action).
If you're a moral realist, and you think moral opinions are statements of fact (which may be right or wrong), then you think it's possible to "know in your heart" moral "facts".
If you're a moral anti-realist (like me), and you think moral opinions are statements of preferences (in other words, statements of fact about your own preferences and your own brain-wiring), then all moral opinions are such. And then surely Manson's statement of his preferences has the same status as anyone else's, and the only difference is that most people di...
Another month has passed and here is a new rationality quotes thread. The usual rules are:
And one new rule: