Point one is invalid. You are conflating 'reading important news' and 'reading all news (def. = important and unimportant news)'. My argument was meant to read

Point one is invalid. You are conflating 'reading important news' and 'reading all news (def. = important and unimportant news)'. My argument was meant to read as follows, (1) reading 'important news' is important. (tautology) (2) reading 'all news' is not important. (tautology -- using def. of 'all news') (3) Usually doing an unimportant activity is a waste of time iff you have something important to do. (4) Therefore, usually reading 'all news' is a waste of time iff you have something important to do. (from 2 and 3) I thought this was clear, even if I wasn't explicit.