[DanBC]

> And so we don't generally have laws that require us to look both ways before crossing a street,

You do have laws telling you where abouts you can cross a road, right? Laws about jay walking?

(Your tone is sub-optimal. I guess that's why your getting downvotes.)

[sipior]

Well, that's a fair point, DanBC, but I generally regard laws about jaywalking to be a bit silly, and one of those things that I mentioned we'll need to fix at some point. If you're interested, I encourage you to Google "invention of jaywalking" for some insight into how that became a "crime".

And my thanks for your concern about downvotes, but I'm not very much bothered about them. What's the point of writing for the approval of a largely anonymous group of others? My only concern might be that my words would be construed as disrespectful to the late Dr Nash, but on a second reading I don't really see that. If some folks choose to disagree using some arbitrary points system instead of arguing properly, I guess that's their own affair.