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Quality Thinking · Nutrition for the Mind

moon not made of cheese

Fact or Opinion?

Common Sense or Nonsense?

Explanation or Excuse?

Open-minded or Empty-headed?

Professor Tangent can help you decide with skeptical inquiry, brainteasers, games, logic, common sense, humor and curriculum suggestions for educators, homeschoolers and students of all ages. Quality thinking protects you from being deceived by others, and prevents you from deceiving yourself.

Just as some foods that taste good might have little nutritional value, or could even be harmful, ideas sometimes seem emotionally satisfying but have little basis in fact or logic. Such ideas could be harmful if they keep you from exploring alternatives. Be at least as careful about what goes into your mind as you are about what goes into your stomach.

Who’s been credited with saying it?