It's such an individual thing. I've heard people say it's not really potty trained unless they are 100% independent - well, ds has been out of diapers 100% of the time for 1.5 years now but still needs/wants help much of the time.
For myself, once they are at a point where they are out of dipes all the time (during the day at least as we know nighttime is a different thing) & reliably able to stay dry (let's be real even older children may occasionally have an accident) it should be considered potty trained.
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