Oops that should be conversation.
You should see (not!) the state of my stuff before I get around to checking it out. Even then, I can't pick up on some things until something I've typed appears in a quotation, where it remain as a red flag for ever, even though I go back to my original post and correct it there.
Apart from just hitting the wrong key, or often two keys at the same time, I believe that I try to do it too quickly and on reviewing it,"know what I think" and read that but not always what the fingers have typed.
And to think I could analogue-type pages of stuff with but a very rare visit to the Tippex paper.
I think keyboards are just too sensitive to the touch.