OK. The more precise statement is that when the test was created you would have had about 99.3% to 99.42% chance that such a sample did not exist if you were to test all the population this test was designed for (depending on population statistics of the time that are a bit unclear).

To be clear, I do not endorse the validity of these tests or their interpretation at any level. Learning to be a lifelong learner can take almost anyone a really long way. The analogy to neural nets is that bigger nets dont always make a better model after a point and every human starts at a very priviledged/huge network capacity.