I always follow the rule of trusting everyone....to be themselves. 

It's nearly impossible for someone not to show you who they are for an extended period of time. Whether irl, or on the Internet. Caveat: not sure about AI. 

Just me, but I always figure out whether you are a good person vs bad. Your intellectual level, etc. 

Our OS is noticing patterns, and we can make a valid determination based upon that, if we are actually paying attention. 

If you constantly contradict yourself, or I catch you lying, etc. I'm going to trust that's what you always do. 

If you always a good person, and act in accordance to who you claim to be, then I'm going to trust that you're that person.