I grew up with my dad who did that & then lived 33 years with a H who also did it truly believing that what he said from inside his head was the truth.....it was totally irritating & I still can't believe a word he says.....that was why I left him & am getting a divorce.

I find that some people don't always believe that their way of thinking is the only way....but their wording of their written word comes out that way....had that issue on FB just the other day in a heated discussion that was going on.....it's very annoying & triggering of past memories.