The Evidence That Convinces Me That Two Plus Two Equals Four

In 1984, Winston Churchill wrote that freedom is the freedom to say two plus two equals three. The evidential crossfire is physical observation, mental visualization, and social agreement. But I have an incredibly hard time visualizing how you could have two things and two things together. And yet somehow when those are thought of as together, you have three things. If that's the way reality worked, you can't really argue with reality, right? It's funny. Yeah.