Every logical fallacy is also a valid heuristic.
Thinking
Operations of thought are like cavalry charges in a battle — they are strictly limited in number, require fresh horses, and must only be made at decisive moments.
—Whitehead
The two great metaphors for society in political philosophy have been machine and organism: thus the two for the individual have been cog and cell.
Better that X guilty men go free than one innocent man be convicted. Solve for X.
You can’t be a polymath without the math.
Every effort to know your own mind changes it, sometimes beyond recognition.
Doubt of the obvious engenders belief in the impossible.
Mental effort dwarfs all other costs.
The facts never speak for themselves.
Ingenuity is fatal in philosophers.
To make a reputation as a deep thinker, settle on a single half-truth early, and spend the rest of your life flogging it.