 Collective self-deception understood in either the summative or non-summative sense raises a number of significant questions such as whether individuals within collectives bear responsibility for their self-deception or the part they play in the collective’s self-deception, and whether collective entities can be held responsible for their epistemic failures. Finally, collective self-deception prompts us to ask what means are available collectives and their members to resist, avoid and escape self-deception. To answer these and other questions, more precise accounts of these forms of self-deception are needed. Given the capacity of collective self-deception to entrench false beliefs and to magnify their consequences—sometimes with disastrous results—collective self-deception is not just a philosophical puzzle; it is a problem that demands attention.