I must have been tricked by this and repeated this more than a few times, no idea where I first heard it. Or am I being tricked by _this_ authoritative sounding

I must have been tricked by this and repeated this more than a few times, no idea where I first heard it. Or am I being tricked by _this_ authoritative sounding post? I don't know which one, but I know this for certain: I'm being duped one way or another!