John 9:20 Commentary - Garner-Howes Baptist Commentary
1 ) "His parents answered them and said,'' (apekrithesan oun kai goneis autou kai eipan) "Then the parents of him replied and said,'' directly, without evasion or equivocation, to the three parts of their question.
2) "We know that this is our son," (oidamen hoti houtos estin ho huios hemon) "We do know that this is (exists as) our heir son," born to us, and we are not ashamed of him, Joh 9:1-3. This is their reply to question one of their three-point quiz, Joh 9:19. This exploded their suspicion of collusion between any of the family of the blind man with Jesus.
3) "And that he was born blind,'' (kai hoti tuphlos egennethe) "And we do know that he was born blind," and has been blind from birth as our son, a thing that has brought us much bitter grief for a long time, Joh 9:1-3. Answer to point two of their three point quiz, Joh 9:19.
Consult other comments:
John 9:20 - Albert Barnes' Notes on the Bible
John 9:20 - Calvin's Complete Commentary
John 9:20 - Expository Notes of Dr. Constable (Old and New Testaments)
John 9:20 - Ellicott's Commentary for English Readers (Old and New Testaments)
John 9:20 - The Expositor’s Greek Testament by Robertson
John 9:20 - Garner-Howes Baptist Commentary
John 9:20 - John Gill's Exposition of the Entire Bible
John 9:20 - English Annotations on the Holy Bible by Matthew Poole
John 9:20 - Old and New Testaments Restoration Commentary
John 9:20 - Robertson's Word Pictures in the New Testament
John 9:20 - A Popular Commentary on the New Testament
John 9:20 - John Trapp's Complete Commentary (Old and New Testaments)
John 9:20 - The Treasury of Scripture Knowledge
John 9:20 - Whedon's Commentary on the Old and New Testaments
Garner-Howes Baptist Commentary

The Garner-Howes Baptist Commentary of the Whole Bible was originally published as a 23-volume set by Albert Garner (principal author) along with J. C. Howes, G.F. Crumley, and Eugene Garner in 1985. The Blessed Hope Foundation has released this digital edition into the public domain.