I want to get a good base tan before I take my vacation. "That'll prevent me from getting a sunburn when I go to the beach." "I think it's a myth that a base tan can protect you from sunburns." "You are so wrong! Let's make a bet. The loser has to jump into that freezing pond." "Fine. I'll do a search on my wireless computer. Here you go: A base tan provides only a negligible SPF 4 protection." "I'm not jumping into that freezing pond." PUSH "You were already ignorant and contentious. I didn't want you to be a welcher too."