My first guess, in INFJs, and even ENFJs for that matter (while Ti is the inferior, it’s still the sidekick judging function), is that we need to be aware of how anything that initially ‘makes sense’ to us isn’t based on objective reality so much as it makes sense according to our own experience of the world. Ti isn’t really in any managerial position, it works for Fe. Our focus goes to people- and with Pi in the lead (N, no less), perception directed inward, we can’t help but ‘notice’ possible intentions and such behind other people’s words and actions. If we don’t realize that these things only make sense according to our own experience- and instead simply notice they ‘make sense’- then we jump to erroneous conclusions about why people have said or done certain things. It’s the stuff NFJ horror stories are made of: paranoia, projecting insecurities, refusing to believe people feel what they claim to feel, believing we know best what will make someone happy or sad or angry or whatever (like if someone tells us they’re angry at us, but the reason they give doesn’t ‘make sense’ because it isn’t something that makes us angry ourselves- assuming the person is wrong about why they’re angry), etc. When we can’t separate our experience from THE TRUTH ABOUT EVERYONE while making sense of others’ words and actions…..it’s a non-stop barrel of laughs for everyone involved. But (back to thread topic) I don’t think it has as much to do with whether or not we’re perceived as fake so much as whether or not we embrace shared reality. [If we genuinely believe a fake reality, is that being fake?]
I don’t even know how to directly answer the op because there are too many ways to interpret ‘fake’.