The agreement of someone not deemed able to give consent due to, for example, youth or cognitive impairment [see also Consent]. This contains the implication that a parent or a carer will always be better able to give consent than a child or a patient. However, that may not be the case if the parent or carer’s own judgement is impaired due to, for example, substance misuse, side-effects of prescription drugs, or severe mental illness (Bray 2014). Young children, those with cognitive impairment, and others, may be able to give consent if they are asked in a way that they can understand (Alderson and Morrow 2011).