And they asked them, saying, is this your son
The first question they put was, whether the man that stood
before them, pointing to him, was their son or not; whether they
knew him by any marks to be their son, and would own him as such:
had they answered to this in the negative, they would have got an
advantage against him, and would have convicted him of a lie,
since he had given out that he was the son of such parents; and
proving such a lie upon him, would at once have brought the whole
affair into suspicion at least: they add,
who ye say was born blind;
this contains a second question, whether, if this was their son,
he was born blind or not; and if he was not born blind, though he
had been blind, it would have greatly lessened the miracle: and
besides, they would have put other questions upon this, whether
his blindness was real, and by what means it came. Next follows a
third question,
how then doth he now see?
By what means has he received his sight? They might hope, that if
he was their son, and was really born blind, that he had his
sight some other way than by Jesus; or they might object this to
his being born, blind, as being a thing impossible, or at least
not credible that he should ever see, was that the case.