The time it takes to learn enough about a person to be able to either trust them, or catch them being fake, is too long, is there a way to shorten it?

It takes a few years to really get to know a person. Why isn't anyone attempting to figure out a way to speed that up without cutting corners on effectiveness?

The time it takes to learn enough about a person to be able to either trust them, or catch them being fake, is too long, is there a way to shorten it?
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