Earlier quoted context omitted.
Being popular != Monopoly Having Market Share Dominance != Monopoly Being a monopoly means having sole control over the supply of a market (conversely, Monopsony is demand ). When people say Bing, Baidu, DDG, Yahoo, DDG, etc. are all a click a way, that means Google does not control the market supply. Just because the majority of people choose to use something on an open market doesn't mean that thing has a monopoly.
Schmidt seems concerned they are in that territory. Also, the document I linked to, presumably written by people with deep expertise on the topic, has several relevant sections. One excerpt: === A. GOOGLE HAS MONOPOLY POWER IN RELEVANT MARKETS A firm is a monopolist if it can profitably raise prices substantially above the competitive level. [M]onopoly power may be inferred from a firm's possesion of a dominant share…
Also, a half-redacted document written by an anonymous person that was accidentally released almost a decade ago does not change the definition of a monopoly.
Yes, you can assume that it's written by someone who knows what they're talking about, just as much as you can also presume they were wrong because it was squashed. That's a moot argument.
None of that changes the fact that being popular does not make something a monopoly.