Falk stated that Martin's assertions were unsubstantiated. Pure reason makes four kinds of contradictory assertions about these Ideas. His lawyer stated that all of the articles' "allegations and factual assertions are false". Porter has been criticized by some academics for inconsistent logical argument in his assertions. It is not sufficient to simply reverse his denials and assertions. There is no scientific evidence to support such assertions. Such dogmatic assertions can't be proved. This is contrary to the assertions of several authors. The Russian government rejects the validity of such assertions. The evidence for these blatant assertions is nowhere produced. However, there has been no evidence for any of these assertions. Gil Brandt also questioned the veracity of Casserly's assertions. Many of the assertions he tweeted have been proven false. Whittaker based his approach on theoretical assertions and empirical sampling. Subsequent closer examination of Titor's assertions provoked widespread skepticism.