[iinnPP]

I'm sure you can be unconsciously intent on things, but gaslighting is a unique concept. Here's the definition I am relying on: manipulate (someone) using psychological methods into questioning their own sanity or powers of reasoning.

In your provided example, the user is obviously not trying to manipulate someone into questioning their sanity, nor power of reasoning. Quite the opposite. Lying to themselves (your example) for sure.

[BoredPositron]

gaslighting is the act of invalidating one’s own, true experience and yes you can do it yourself.

https://philpapers.org/rec/MCGAIG

https://www.psychologytoday.com/us/blog/emotional-sobriety/2...