I can't do something. much less practice it, unless I know what to do.
I nearly got in an altercation a few years back with a wonderfully patient
sensei who did not have a clue what I was talking about.
A demonstration
Him, "Did you see it that time?"
Me, "No"
Another demo
Him "Did you see it THAT time?"
Me, "No. Just what am I supposed to be looking at?"
Him, "Everything!"

BTW Happy 4th of July