Instructions for the test are to indicate "Yes" if either of two choices is correct" and "No" if neither of the too choices is correct." Unfortunately it rejects answers that are correctly entered according to the stated criteria.

After the first abort, I went back and reread - with extreme and diligent care - all of the instructions, and tried again. The test itself is "biased" or created by illiterates. (But then it's Harvard, so I guess that's not too unexpected.)

Sorry, but I'm not at all impressed.

John