“7....The mere fact that a claimant might be sufficiently motivated to perform a task when there is specific or unusual impetus to do so does not, of itself, inform as to the overall position and the generality of the situation. So, it is not appropriate to limit the scope of the enquiry to such days. True an ability to perform a task without prompting when there is particular pressure to do so might be indicative of a claimant simply exercising a choice not to perform such a task on impetus absent days but that will not necessarily follow. What has to be undertaken is a more general and all-encompassing consideration. So, there needs to be an assessment, in such cases, of why it is that, on days when a claimant does not perform certain tasks, he/she does not do so. If it is because, without any specific impetus, he/she is not motivated to do so as a result of health difficulties and that such days exist for more than 50% of the time in the relevant assessment period, then absent other pertinent considerations, the relevant descriptor or descriptors will apply. That was not this tribunal’s approach, and I conclude that, in consequence, it did err in law.”