Give Me the Data; Don’t Whine

You have a trading strategy that works? Prove it. Give me the empirical data. Or you can go this direction:

When people see something they love is under threat, their first reaction is to build an “impenetrable” wall, a Maginot Line–and just to be extra safe they decide to enclose a bit more territory, a buffer zone, inside its fortifications. It seems like a good, prudent idea. It seems to protect us from the awful slippery slope, the insidious thin edge of the wedge, and as everyone knows, if you give them an inch, they’ll take a mile. Dig the moat! Build the wall! And as far out as you can afford. But this policy typically burdens the defenders with a brittle, extravagant (implausible, indefensible) set of dogmas that cannot be defended rationally–and hence must be defended, in the end, with desperate clawing and shouting.

Start with the data. Then clawing and shouting go away.

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Source: Dennett, Daniel C. (2013-05-06). Intuition Pumps And Other Tools for Thinking (p. 204). W. W. Norton & Company. Kindle Edition.

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