The survey was not meant to include non-official tests. If you respond to a question about official tests with the result of a non-official test, not only have you lied, you have lied in an important way. Certainly you could argue that the non-official test is as good as measuring IQ as the acceptable tests, but that argument's not up to you to make--the creator of the survey obviously didn't think so and it's his survey The design of the survey reflects his decision about what sources of error are acceptable, not yours. He gets to decide that, not you, regardless of whether you can argue for your position or not.