• the public statements by Apple, Amazon and Supermicro
• the lack of corroboration from any of the 30 or so affected companies and organisations
• the lack of corroboration from other sources
• the public statements by DHS, FBI, NSA and GCHQ
• the public statements of some of Bloombergs sources
• the overall implausibility of the story
• the lack of sensible explanations from Bloomberg about the above