"Seidenberg (1983), "regard[s] it as certain that knowledge of Pythagoras' Theorem was known to the Satapatha Brahmana, which mentions calculations connected with the purusa bird altar, and to the Taittiriya Samhita, which showed similar geometrical awareness" (106). Since these texts are generally dated to around 1000-800 B.C.E., "Greek geometry did not somehow make its way into Vedic geometry, as Greek geometry is only supposed to have started about 600 B.C." (108). Scholars no longer consider Vedic geometry to have been borrowed from the Greeks, so Seidenberg's more controversial claim in the modern context is his rejection of the possibility that the algebra either of the Indians or the Greeks was derived from Babylonia, since the former were aware of aspects of the theorem to which the Babylonians make no reference. He also rejects the possibility that these aspects could have been discovered by the Indians after receiving the basic theorem from Babylonia and then transforming it, and concludes that either "Old Babylonia got the theorem of Pythagoras from India or that Old Babylonia and India got it from a third source" (Seidenberg 1983, 121)."