Dentist said I have 6 cavities?

I went to a nice upscale dentist, and had a complete exam done. They said I needed 6 cavities filled and two root canals, Then I check with TWO other dentist that wasn't as nice looking inside.. One said there is cavities but no root canals needed, and the other said there is no cavities or root canals needed.. so like wtf who am I supposed to believe?
Dentist said I have 6 cavities?
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