“Every year there is a slightly smaller percentage of American households owning guns.” That’s former President Bill Clinton speaking at a campaign rally for his wife, railing against the the “gun lobby.” politifact.com checked Mr. Clinton’s assertion and rated it half true. This despite the fact that their analysis of various polls proved the statement false. (While there have been years with slight dips, the overall number remains flat.) What’s not addressed: how valid are any of these polls? Would your average gun owner admit to an anonymous survey taker that he or she owned guns? Would you?