Deliberation is (probably) triggered and sustained by multiple mechanisms.

Abstract

De Neys proposes that deliberation is triggered and sustained by uncertainty. I argue that there are cases where deliberation occurs with low uncertainty - such as when problems are excessively complicated and the reasoner decides against engaging in deliberation - and that there are likely multiple factors that lead to (or undermine) deliberation. Nonetheless, De Neys is correct to surface these issues.