The law adopts a cliff-edge approach to capacity, drawing a bright line between those who are deemed to have the capacity to make a decision and those who are not. This reflects Enlightenment ideas about the limits of legitimate state authority, according to which substantial justification is required before the state can interfere with the autonomous choices of its citizens. Given its role in distinguishing those who are capable of making autonomous choices (to whom the state defers) from those who are not, it is generally assumed that the test for capacity must be neutral as to the substance of the values, beliefs, or reasons underpinning any given decision, so as to leave proper space for individual autonomy. As a result, the Mental Capacity Act 2005 adopts a process-orientated account of capacity, which focuses on whether certain of the person’s cognitive capacities are intact, and not on the outcome of the decision, or on the substance or origins of values or beliefs which underpin it.