  Locke, in part desiring to avoid these obvious difficulties or irrational and immoral failures of consent, introduced the notion of tacit consent (Locke 1990). The possibility of tacit consent allows that one may consent without having to go through the usual motions associated with expression of consent. For example, at a board meeting, one consents tacitly to the chairman's scheduling a meeting if one says nothing when the chair asks for objections to the proposal. And that tacit consent is valid to the extent that the failure to object is understood as a kind of consent and is voluntary.