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Really? I did not notice any ambiguity. Can you give an example?

I could not figure out "(Don't be evil, was a joke?)".

I read it as an offhand comment to the effect of: remember when people at Microsoft thought that "Don't be evil" (and Google in general) was a joke?

"Let me say that again: Attacking a market incumbent on an area of it's core strength - It's hardest in technology companies."