misd-agin
Thanks for your nice reply. I'll make this the last on our banter,before being accused of taking over the thread!
Don't your racehorses have blinkers in the States? They are shields on the side of the horses eyes,so that the horse only sees ahead,presumably to avoid distractions from peripheral vision/spectator movement. Therefore "blinkered" means (in your case) answering without thinking about all the possibilities.