Mary to Jamal: You acknowledge that as the legitimate owner of this business I have the legal right to sell it whenever I wish. But also you claim that because loyal employees will suffer if I sell it, I ttherefore have no right to do so. Obviously, your statements taken together are absurd.
Mary's reasoning is most vulnerable to the criticism that she overlooks the possibility that when Jamal claims that she has no right to sell the business, he simply means she has no right to do so at this time.