Indeed. I found all that guff about race-tracks and flags awfully confusing. Don't use metaphors, if a simple statement of the facts would do the trick. I used

Indeed. I found all that guff about race-tracks and flags awfully confusing. Don't use metaphors, if a simple statement of the facts would do the trick. I used to have a subscription to SciAm, but I cancelled it 30 years ago (partly because Martin Gardner stopped writing for them).