John 9:18 The Jews did not believe that he had been blind and had received his sight, until they called the parents of the man who had received his sight 19 and asked them, “Is this your son, who you say was born blind? How then does he now see?” 20 His parents answered, “We know that this is our son and that he was born blind. 21 But how he now sees we do not know, nor do we know who opened his eyes. Ask him; he is of age. He will speak for himself.” 22 (His parents said these things because they feared the Jews, for the Jews had already agreed that if anyone should confess Jesus  to be Christ, he was to be put out of the synagogue.) 23 Therefore his parents said, “He is of age; ask him.”24 So for the second time they called the man who had been blind and said to him, “Give glory to God. We know that this man is a sinner.” 25 He answered, “Whether he is a sinner I do not know. One thing I do know, that though I was blind, now I see.”
And so they say, ask him, verse 23, you see it again, “Therefore said his parents, he is of age, ask him…ask him.” Now they’ve got evidence. They know it’s the right child. They know he can see. They know Jesus put the clay on his eyes. He went to the pool, he washed his eyes. He came out of there and he could see. They know all the evidence there is to know. And they’re going to take all those facts and do their research.
Now watch the conclusion. Verse 24, “Then again called they the man that was blind and said unto him, Give God the praise, God did it. We know that this man…who?…Jesus is a sinner.” Listen, we’ve taken all the facts into account, we’ve done all our research, give God the praise, we know Jesus is a sinner.
How do you know? It’s innate. See…stupid. What kind of research is that? All the evidence…He’s a sinner, we know it, evidence aside, witnesses aside, seeing eyes aside, we know…hmmph. Boy, that’s hard to believe. That’s unbelievable unbelief. And Moses was right, they were children in whom there was no faith. All the evidence in the world and we know…that’s like the math student, you know. The math student who decides that four and four is not eight, four and four is thirteen and a quarter. And then spends all his life researching it and every research project comes out eight, but he is unmoved. It is thirteen and a quarter. How do you know? I know…
And that’s the way unbelief is, see. Unbelief exposed to all the facts and all the evidence comes up with unbelief, that’s the way it is. That’s subjective research. That’s the worst kind of research there is. Start with some great big conclusion and then disregard the facts. Personal statement that then does research to confirm that statement is backwards. Objective research is the only kind that starts with nothing, takes the evidence and comes to a conclusion. But the Pharisees did their bias subjective research to find evidence to support their preclusion. And even though they couldn’t support it it didn’t change them cause they didn’t believe it anyway. That’s the way unbelief is.