But first, as we have already remarked, the correction of arguments that depend upon the same point ought to be the same, whereas this one will not hold if one adopts the same principle in regard not to knowing something, but to being, or to being in a certain state (e.g. it is a father, and is also yours); for if in some cases this is true (and it is possible to know and not to know the same thing), yet with that case the solution stated has nothing to do.