Hmm. I don't usually get imposter syndrome. Wait, does that mean this is saying I am an imposter? Oh no, what if I am? But wait, wasn't that thought imposter syndrome? That means I'm not an imposter. Wait, now I'm back to not having imposter syndrome. Oh no.
Your comment is an example of a logical fallacy called "affirming the consequent." Borrowing from Wikipedia, a good example of affirming the consequent is: 1. If an animal is a dog, then it has four legs. 2. My cat has four legs. 3. Therefore, my cat is a dog. The problem is the conclusion is the result of a reversal of the conditional statement. Similarly, you've said, essentially, 1. If I am an imposter, then I wil…
It's more like a paradox where you start to loop. Similar to a sentence such as "I always lie".
Or it's kind of like a Dunning-Kruger where the premise would be that:
1. Smart people think they are dumb.
2. Dumb people think they are smart.
So you start to loop between those never being able to figure out if you are actually smart or dumb.