I’d need to get a way of what the candidate picks out about it, and perhaps to attempt to transfer the discussion onto issues of type quite than content . This argument will apply until the fingers are the identical distance from the centre. The candidate ought to then be in a position to clarify why each fingers attain the centre of the rule simultaneously noticed. In some cases, notably if we now have not accomplished a quantitative query already, we might then proceed with a quantitative analysis of forces and moments.