I felt this once in my life. I was the most hung over I had ever been and sitting at work and realized I hadn’t had a thought in my head all morning / afternoon until this one. It was literally like just blank no thought entered or left. I was just there. Who knows what else I did the night before ... I was young but obviously did something to my brain. Short lived thank God. I then remember thinking “oh this is what really dumb people must feel like all the time.” It was an interesting feeling for sure.