They stated that the software on an actual plane would be different from the software on which Teso had tested his app. A mathematics professor from Texas A&M University has argued that the plane must have entered the sea vertically; any other angle of entry would have splintered the airplane to many pieces, which would have necessarily been found already. On 17 July 2014, Malaysia Airlines Flight 17 was shot down over Ukraine. Because it, like Flight 370, was also a Boeing 777, some conspiracy theorists have suggested that the plane that crashed in Ukraine was actually Flight 370. This is based in part on photographs of the crash scene, which conspiracy theorists claim show that the plane that crashed in Ukraine had structural differences from MH17. Experts have dismissed this theory and argued that it is merely coincidental that both planes involved belonged to the same airline. When Indonesia AirAsia Flight 8501 crashed on 28 December 2014, various similarities with MH370 were noted, including that both airlines were Malaysian-owned, and that both planes lost contact with air traffic control. There was also a reported conspiracy theory involving an alleged prediction on 15 December 2014 on Chinese news sites cite the user's name as "老百姓有自己的乐", which can be translated as 'the common people have their own pleasures'. The Chinese term "楼主" could be hyper-literally read as 'master of a building', but this would be non-idiomatic, and in the context of Internet forums it invariably refers to the opener of a forum thread, referred to in English Internet slang as the 'original poster' or OP.}}). The user's post warned Chinese people to stay away from AirAsia as it would be attacked, as MH370 and MH17 allegedly had been (according to the user), as part of a conspiracy by a "black hand" or "despicable international bully" to harm Malaysian-owned airlines. Other online posters suggested that the user was either a Chinese intelligence official or a hacker who had come across secret information. The theory that MH370 may have been consumed by a black hole received considerable attention when Don Lemon asked, on CNN, whether it was "preposterous" that it could have happened. Lemon was criticised for this by Jon Stewart on "The Daily Show", and by former U.S. Department of Transportation Inspector General Mary Schiavo, who, while appearing on CNN, said that "...a small black hole would suck in our entire universe so we know it's not that."