Is-ought fallacy

What it is

Slips from a description of how things are to a claim about how they should be, without stating the value judgement that bridges the two.

Related

• Appeal to nature fallacy
  Appeal to nature moves from what is "natural" to what is good, a slip from is to ought.
• Moralistic fallacy fallacy
  These cross in opposite directions: is-ought derives how things should be from how they are, the moralistic fallacy derives how they are from how they should be.

References

• Wikipedia: Is-ought fallacy en.wikipedia.org
• Internet Encyclopedia of Philosophy: Fallacies iep.utm.edu
• Stanford Encyclopedia of Philosophy: Fallacies plato.stanford.edu
• Wikipedia: List of fallacies en.wikipedia.org
• Purdue OWL: Logical fallacies owl.purdue.edu

More in “False choices, circles and leaps”