Proponents of the TSSI contend that these allegations are false:"We have never said that Marx’s contested insights are necessarily true . . . . We simply say the claims that his value theory is "necessarily wrong", because it is logically invalid, are false."Similarly, Andrew Kliman distinguishes between internal consistency on the one hand, and truth or correctness on the other, at least nine different times. For instance, he writes that the TSSI's ability to eliminate the apparent inconsistencies in Marx's value theory does not imply "that Marx’s theoretical conclusions are necessarily correct. It does imply, however, that empirical investigation is needed in order to determine whether they are correct or not. There is no justification for disqualifying his theories "a priori", on logical grounds."