I have a theory regarding why some users of the site are not being able to pass page 7 of 8 of the stress test without encountering the same problems or being unable to proceed,

I think the computer generated responses compiles a list of letters, or numbers that the programmer has associated with the “answers out of a text book theory” and if the programmer didn’t cover every or all possible numerical or alphabetical combinations, of all the questions answered, because its not in the book, then it will not let you proceed has it will not have the correct answer for you

If after 7 pages of questions the computer cant specify for a better word, diagnosis based on the randomness of the letters chosen then it wont let you proceed to the final page.

I could be wrong