Truth is just a tool that helps you make good predictions. It's increasingly clear that this is all intelligence amounts to: a constant cycle of prediction and error correction with the goal of maximizing reproductive fitness in humans or minimizing a loss function in machines.

One serious problem we're facing lately is that truth is not always predictive of how systems controlled by bad-faith actors will behave and evolve. We live in a post-truth era, made possible by social networking and information technologies in general. It's not enough to "lie according to a fixed convention," as there are now multiple competing conventions.

This was always the case to some extent, but these days the impedance mismatch between truth and consequences is a target for zero-sum arbitrage. The truth won't set you free if you join the wrong cult; it's more likely to bankrupt you or worse.