It is a reasonable assumption given that you didn't know what a Viewfinder was, and keep insisting the screen on the back is one even now. When your mistake wa

It is a reasonable assumption given that you didn't know what a Viewfinder was, and keep insisting the screen on the back is one even now. When your mistake was pointed out by multiple posters, you then doubled down, called the industry standard terminology that is likely older than either of us "pedantic." It is fine to not know things, or to have holes in your knowledge. It isn't fine to keep on doubling down rather than admit obvious mistakes. All you had to do was read the Wikipedia article on Viewfinders in the "decades" you've been "professionally" taking photos.