<jats:p>Writers on cognitive development differ on whether children are naturally inclined to maintain a veridical conception of the world or whether such an inclination emerges only gradually in the course of development. In either case, however, it is assumed that there is a consistent premium on veridicality. I argue against that assumption. Three different contexts are examined in which successful cognitive performance depends on temporarily setting aside what is known to be the case: counterfactual thinking, syllogistic reasoning and the comprehension of connected discourse.</jats:p>