A clergyman, a doctor and a business consultant were playing golf together one day and were waiting for a particularly slow group ahead. The business consultant exclaimed, "What's with these people? We've been waiting over half and hour! It's a complete disgrace." The doctor agreed, "They're hopeless, I've never seen such a rabble on a golf course." The clergyman spotted the approaching greenskeeper and asked him what was going on, "What's happening with that group ahead of us? They're surely too slow and useless to be playing, aren't they?" The greenskeeper replied, "Oh, yes, that's a group of blind fire-fighters. They lost their sight saving our clubhouse from a fire last year, so we always let them play for free anytime." The three golfers fell silent for a moment. The clergyman said, "Oh dear, that's so sad. I shall say some special prayers for them tonight." The doctor added, rather meekly, "That's a good thought. I'll get in touch with an ophthalmic surgeon friend of mine to see if there's anything that can be done for them." After pondering the situation for a few seconds, the business consultant turned to the greens keeper and asked, "Why can't they play at night?"