Further objections at this point lead to a second line of response. Alvin Plantinga responds to the grounding objection by saying "It seems to me much clearer that some counterfactuals of freedom are at least possibly true than that the truth of propositions must, in general, be grounded in this way." William Lane Craig follows up on this by pointing out the burden of proof the grounding objector bears. The grounding objection “asserts that there are no true counterfactuals about how creatures would freely act under any given set of circumstances. This assertion is no mere ostensibly undercutting defeater of Molinism, but a putatively rebutting defeater. It makes a bold and positive assertion and therefore requires warrant in excess of that which attends the Molinist assumption that there are true counterfactuals about creaturely free actions.” Latter, Craig points out “Anti–Molinists have not even begun the task of showing that counterfactuals of creaturely freedom are members of the set of propositions or statements which require truth–makers if they are to be true.” Thus the grounding objector must prove a universal negative regarding the falsity of counterfactuals of freedom or he must explain his theory of the basis for truth and prove that theory true.