Jon Blow is a smart guy, but this sounds like he just hasn't looked at the problem long enough and deep enough to understand it. I'm sure almost everyone here

Jon Blow is a smart guy, but this sounds like he just hasn't looked at the problem long enough and deep enough to understand it. I'm sure almost everyone here has at some point looked at a task an said 'Oh that's easy, I'll do it in a week!', and then realised that it's a rabbit warren of peculiar instances, customer needs, and unique problems. It's like people who think Time is easy, but they forgot timezones, and then they write timezones but they forgot half hour timezones, or quarter hour timezones, or daylight savings time, or leap years, or different calendars, or the fact that calendars change over time, over place, that timezones change, are adapted, etc.