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See here I was thinking private company freedom to do what you want; ie can’t force a baker to make specific cakes; and this angle of anti-trust...you can always go to a different baker! Thanks! 
Exactly. There are a thousand bakers in New York. There is one Google in the entire world. Scale and proportion matter.
Sure if you look at specific companies then of course they're going to be a monopoly on that specific company. There are alternatives tho
Yes. The whole point of antitrust is to prevent monopolistic abuse of power.
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