Glass half full, glass half empty?

There's been a lot of excitement about the Zogby impeachment question, that is, the pollster Zogby found 42% of Americans agreed that "if President Bush did not tell the truth about his reasons for going to war with Iraq, Congress should consider holding him accountable through impeachment"

Mark Kleiman warned against overinterpretation. 'Note (a) the big "if" and (b) the word "consider,"' he said. My boyfriend sensibly pointed out that given the big "if" and the word "consider", shouldn't the number of Americans agreeing with the question be 100% rather than 42%? Shouldn't the real headlines (or, you know, the title thingies on top of blog posts) be "58% of American thinks it's A-OK for the president to lie to them about going to war" rather than "Yess! 42% of the country possibly thinks we should impeach Bush if he lied to get us to go to war!"