10. 2. Don’t be so sure of your positions
• Unless already been examined for basis
• Examine all reasons for taking a position
• Resist indoctrination
11. 3. Consider all angles
• Include ideas / opinions / facts / beliefs
contrary to your own
• Avoid personal biases if possible
12. 4. Know the Knowns, Unknowns and
Unknowables
• In examining basis, classify them:
Known
Fact. Irrefutable
Unknown
Yet to be known,
but can find out
• On belief / instinct / unknowable:
– Plausible vs Implausible
– Apply Occam’s Razor
Unknowable
Belief, instinct or
matter of opinion
13. Among competing hypotheses, the one with the
fewest assumptions should be selected.
Other, more complicated solutions may ultimately
prove correct, but—in the absence of certainty—the
fewer assumptions that are made, the better.
14. 5. Test those positions for consistency
• Correspondence AND Coherence
Correspondence
How consistent is it with
your observations of how it
relates to the world?
Coherence
How consistent is it in how it
relates with other claims /
beliefs / statements?
• Only true logical test of the Unknowable
19. Thought Exercise
• What are some positions you hold? Are they
well-informed? Or is it from indoctrination?
• Have you challenged yourself on those
positions?