Previous posts have explained why it is silly to look to facts as if one of them was a magic bullet which would reveal the Truth. The facts matter but in combination. This post notes that, sometimes, even properly-weighted facts may not be enough.
For example, people have been debating whether or not there is a price bubble in Canadian residential real estate for nearly a decade. To a true believer on either side, the fact that the price is “high” is no longer important, either because it is added proof that prices will crash in the very near future or because it reveals some previously-unconsidered explanation. As a researcher, I can say that it is hard for experts to identify bubbles in advance.
Weights matter when interpreting facts because debating the correct weights opens a new dimension to the discussion. When arguing with somebody who attaches radically different weights to facts than you do, having the important facts may not be enough to convince somebody. Communicating effectively, not just analysing correctly, turns facts into wisdom and action.