Over the last 10 years, there's now doubt we've all got dumber, and by 'we”, I mean all of us on average. To put it as simply as I can, you and I just haven't been sufficiently bright enough to raise the average that the newly minted dummies pouring out of schools and university are relentlessly bringing down.

We're dumb all over.
'Eighteen per cent of New Zealanders had a bachelor's degree in 2007, up from 9.2 per cent in 1997,” says Deborah Hill-Cone, meaning, 'The proportion of people with degrees has doubled over the past 10 years.
'During that time,” she says, however, 'I suspect we've actually got dumber.”
I suspect she's dead right. Universities and degree mills have sprung up like gorse across a Taranaki farm, but too few of their degrees mean a damn thing.
Hill-Cone's gripe, 'Unfashionable in these days of righteous self-improvement, is that there are far too many students and far too many universities and when you graduate these days you're getting a ‘Degree Lite'.”

Bang on.
Most students are dumber when they leave university than they are when they enter (and when they enter pitifully few are able even to do anything more than write their own name successfully). One glance at what now passes for university work is enough to see how unchallenging it is and one conversation with a graduate will tell you that it's not independent thinking that's valued, but regurgitation; in most cases regurgitation of nonsense. The Attorney General reckons, for example, that 'Too many lawyers practising at the bar are incompetent,” and their university courses were 'a joke”.
The leaky homes saga tells you all you need to know about the quality of an architect's education. And just talk to a graduate from a New Zealand philosophy department and you'll see the closest thing you're going to see to a human being who's been pithed.)
But we're dumb all over; it's not just here in EnZed. In the States they're talking about the failure of socialist studies courses to deliver on their promise 'to promote civic competence”.
'A social studies education encourages and enables each student to acquire a core of basic knowledge,” So how's that working for them?
The Jay P. Greene Blog takes up the story [hat tip Powell History]:
'The Goldwater Institute gave a version of the United States Citizenship Test to Arizona high school students, only to learn that they were profoundly ignorant regarding American government, history and geography. Only 3.5 per cent of Arizona public school students got six or more questions correct, the passing threshold for immigrants, [and] the passing rate for Oklahoma high school students was 2.8 per cent. They somehow underperformed Arizona's already abysmally pathetic performance.”
'So despite indoctrination almost since birth, Kindergarten through Grade 12 these high school students wouldn't do much worse if the pollster asked them questions in Sanskrit instead of English. The pollster would say, 'I am going to ask you some questions about American civics in Sanskrit. Answer as best you can.”

'There is some small chance they would answer ‘George Washington' after all.”
Now despite EnZed high school students generally being dumb as a bag full of rocks (and their university counterparts being twice as bad), I'm prepared to bet that EnZed students would do better than the Americans even in the American Citizenship Test (but maybe not in Sanskrit). And that ‘NOT P.C.' blog readers would do even better.
In fact, let's see what the average result for self-selecting ‘NOT P.C.' blog readers is for the following ten questions.

Answers are here (scroll down).

What is the Supreme Law of the US?
What do we call the first 10 amendments to the Constitution?
What are the two parts of the US Congress?
How many justices are on the US Supreme Court?
Who wrote the Declaration of Independence?
What ocean is on the east coast of the United States?
What are the two major political parties in the United States?
A US Senator is elected for how many years?
Who was the first President of the United States?
Who is in charge of the executive branch?

To start you off I got ten. But then, I saw the answers first.