There are some confounding factors (from my reading) - a.) the more likely Google thinks you are a human, the easier the tests/less tests you have to pass - are

There are some confounding factors (from my reading) - a.) the more likely Google thinks you are a human, the easier the tests/less tests you have to pass - are they repeating the test on the same computer all the time or are they mixing it up some how b.) the README states Google uses some of your interaction speed times/history with internet/Google to determine level of difficulty of captcha - if it's the same computer - and they repeat the tests on the same computer, are they just getting easier tests the better it gets? (My experience with visual captchas is I would be happy to get 85% success rate with those). They probably are not seeding the computer with 9 days of simulated activity to get the easiest captcha suite to make it seem human or are they? c.) since there could be multiple tests if Google thinks you are a computer, are they counting successful attempts in an ultimately unsuccessfuly run - is passing 5 then failing the 6th count as 5 success /1 failure or 1 failure?