> intelligence [is] the ability to tell what is true from what is false.

This is a poor definition. There are very intelligent Christians and very intelligent atheists. They can't both be right. Isaac Newton, one of the most intelligent people in history, believed in all sorts of weird astrological stuff. Etc.

My view is that intelligence is a number that's correlated with a wide variety of different measures of cognitive performance. So it's not really possible to give a glib, one-sentence description of it.