So they answered Jesus, “We do not know.” And he said to them, “Neither will I tell you by what authority I do these things.
And they answered Jesus and said, we cannot tell,.... They saw the dilemma they were brought into; they chose rather therefore to speak against their own consciences, and tell a wilful lie, and incur the reproach of ignorance: who, at other times, took upon them to judge of a prophet, whether he was a true or a false one, and by what authority he acted...
Verse 27. We cannot tell. This was a direct falsehood. They could have told; and it should have been, we will not tell. There was no reason but that why they did not tell. The reason probably why they would not acknowledge that John was a prophet was that, if they did, they saw he could easily show them by what authority he did those things; i.e., as Messiah.
And they answered Jesus, and said, We cannot tell--Evidently their difficulty was, how to answer, so as neither to shake their determination to reject the claims of Christ nor damage their reputation with the people. For the truth itself they cared nothing whatever.