Tipler's Omega Point Cosmology has been wildly controversial, dividing physicists on the issue. Physicist David Deutsch defends the physics of the Omega Point cosmology, and incorporates it as a central feature of the fourth strand of his "four strands" concept of fundamental reality; although he is highly critical of Tipler's theological conclusions and what Deutsch states are exaggerated claims that have caused other scientists and philosophers to reject his theory out of hand. Deutsch writes that while much of the physics in Tipler's writing is correct, Tipler has failed to create a consensus in favor of his claim that the laws of physics require a conscious observer in the future light-cone of every spacetime point. Scholars are also skeptical of Tipler's argument that if an immortal entity with advanced technology exists in the future, such a being would necessarily resemble the Judeo-Christian God. Researcher Anders Sandberg pointed out that he believes the Omega Point Theory has many flaws, including missing proofs.