The quiz includes two unscored positions. The question on foreign policy is unscored because it is orthogonal to the axes of personal and economic liberty. The last question is a shameless plug for a Green Tax Shift, which alas is still too esoteric to help measure where one falls on the traditional Nolan Chart.
Bob Barr reportedly scores a 100/100 on the WSPQ, which is arguably accurate if you interpret its ten questions as being only about the federal government that he’s proposing to lead. Depending on which of his pronouncements you listen to, Ron Paul could claim a WSPQ 100/100 even without the federal scope limitation. However, neither would score a 100/100 on the above quiz, due to some combination of their answers on taxes, abortion, and gay marriage.
Bryan Caplan’s Libertarian Purity Test is not a Nolan-chart-type quiz, but it would be interesting for anarcholibertarian fans of Ron Paul to try to score him on it by proxy. I figure the good doctor gets about an 88, three points more than me. (Caplan’s test doesn’t ask about reproductive rights, gay marriage, or sales/excise taxes.)