I don't know it's not my problem. I'm not the one with the burden of proof.
I know you did not say I was Seven. I was speaking of someone else.
Are you 100% certain that you are not delusional?
If yes, how exactly are you 100% certain?
I think we as humans are all in the same boat in regards to not actually knowing if we are delusional or not.
Now, we can make reasonable assumptions that we likely are not delusional (I do this myself, I live my life as if I'm not delusional). Like I've said though, how can we truely be 100% certain. If we're not 100% certain then the possibility that we might be delusional is always present.
I think an accurate statement is:
I don't think I'm delusional but I might be.