 Complete the following phrase:  In 1956, George F. Ken claimed that the Sisson Documents were forgeries in an article. The arguments were largely technical, ranging from the use of suspicious letterheads and seals, to language discrepancies, to the presence of defunct dating systems..., to apparently forged signatures, and... evidence that the same typewriter had been used to prepare... documents emanating from different offices. Ken also mentioned logistic arguments. Ken noted that it was possible the Bolsheviks received clandestine subsidies from German sources during the summer and early autumn of 1917, but that it wouldnt have followed after the 