Not quite 33%, however, in the UK, one can obtain a "pass" with a 40% (this is considered a D-). http://staffcentral.brighton.ac.uk/xpedio/groups/public/documents/staffcentral/doc008335.pdf See here for a UK/US comparison: http://en.wikipedia.org/wiki/British_undergraduate_degree_classification#International_comparisons
This particular test was arguably biased in favor of the computer -- because the computer simulated a 13-year-old boy from the Ukraine who spoke English as a second language. The judges were native English speaking adults from UK/North America, who obviously would not expect complete linguistic or cultural fluency from such an individual. So the computer could make unusual statements and responses, and still get away with it. As the story states: I suspect that if the judges had been actual Ukrainian teenagers, they would have had no trouble identifying the computer as a phony.
Do we need a new, better "Turing Test?" https://andvijaysays.com/2019/04/20/do-we-need-a-better-north-star-for-ai-than-the-turing-test/
'..."pass" with a 40% (this is considered a D-).' Don't I know it. That's what killed my U. London LL.M. dreams. I took a double subject and scored 3 points below the 50% minimum. Had I been an LL.B. student, I'd have gotten credit. Had it been a single subject, the school would have allowed a "condoned pass" for the LL.M. As it was, however, I was looking at retaking a very difficult subject without easy access to a decent library and you get only two chances. So I switched to taxation at Taft and the rest is history. Probably a better choice for me career-wise. I did manage to learn a good bit about jurisprudence anyway.