I didn't intend to get all philosophical. Also I think David Allen agrees that some things don't need to be written down: there's doing work as it comes up, and there are things like eating lunch that many people don't need a reminder for.
Originally Posted by supergtdman
What I mean is: just having a reference system and nothing else wouldn't work for me. I could put into it "check smoke alarms once a month", and whenever I wanted to look up "how often do I need to check smoke alarms?" I could look it up; but then I'd just leave them for months without thinking about them.
Sure -- if you have a better system then GTD, tell us about it. See for example the thread I just started about ABC prioritization. Lots of people improve their systems after starting to use GTD. I don't think it really matters whether we say they're still using GTD (in modified form), or not using GTD but some other system, as long as they're getting things done.
Inability is an abstract thing involving comparison with alternate universes; it cannot be experienced.