 However, the disjunctive notion does not entail that it makes no practical difference which test we cancel. A plausible interpretation of the disjunctive notion might be the following: satisfying either set of the conditions provides a reason for objecting to the proposed action; if both sets of conditions obtain, the objection is presumably stronger than when only one set of conditions obtains. According to this understanding of the disjunctive notion and assuming that in Parfit’s example of the two medical programs the children, if either they or their mothers are not treated, will suffer a severe handicap, the objection to canceling pregnancy testing is stronger than the objection to canceling the preconception testing program. Because the handicap is severe, the children will fall below the threshold and the threshold notion of harm provides the same reason for objecting to canceling either program. But if pregnancy testing is cancelled this will be worse for the children who are not treated—the subjunctive-historical notion of harm applies. The subjunctive-historical notion of harm does not, however, provide a reason for objecting to cancellation of preconception testing. The children who will be born handicapped would never have existed if there had been testing prior to  conception.[12]  This understanding of the disjunctive notion may not, then, be compatible with the no-difference view. An alternative understanding would deny that where both notions of harm are applicable this strengthens the objection to the harmful act. Whether this strengthens the objection and, if so, how much more is a matter of future research (see Woollard 2012: 684–689).