We cannot tell.

Matthew 15:14
Disregard them! They are blind guides. If a blind man leads a blind man, both will fall into a pit."

Matthew 16:3
and in the morning, 'Today it will be stormy, for the sky is red and overcast.' You know how to interpret the appearance of the sky, but not the signs of the times!

Matthew 23:16
Woe to you, blind guides! You say, 'If anyone swears by the temple, it means nothing; but if anyone swears by the gold of the temple, he is bound by his oath.'

Isaiah 6:10
Make the hearts of this people calloused; deafen their ears and close their eyes. Otherwise they might see with their eyes, hear with their ears, understand with their hearts, and turn and be healed.

Isaiah 28:9
Who is it He is trying to teach? To whom is He explaining his message? To infants just weaned from milk? To babies removed from the breast?

Isaiah 29:10-12
For the LORD has poured out on you a spirit of deep sleep; He has shut your eyes, O prophets, and covered your heads, O seers. . . .

Isaiah 42:19, 20
Who is blind but My servant, or deaf like the messenger I am sending? Who is blind like My covenant partner, or blind like the servant of the LORD? . . .

Isaiah 56:10, 11
Israel's watchmen are blind, they are all oblivious; they are all mute dogs, they cannot bark; they are dreamers lying around, loving to slumber. . . .

Jeremiah 8:7-9
Even the stork in the sky knows her appointed seasons. The turtledove, the swift, and the thrush observe their time of migration, but My people do not know the requirements of the LORD. . . .

Malachi 2:6-9
True instruction was in his mouth, and nothing false was found on his lips. He walked with Me in peace and uprightness, and he turned many from iniquity. . . .

Luke 20:7, 8
So they answered that they did not know where it was from. . . .

John 9:30, 40, 41
"That is remarkable indeed!" the man said. "You do not know where He is from, and yet He opened my eyes. . . .

Romans 1:18-22, 28
The wrath of God is being revealed from heaven against all the godlessness and wickedness of men who suppress the truth by their wickedness. . . .

2 Corinthians 4:3
And even if our gospel is veiled, it is veiled to those who are perishing.

2 Thessalonians 2:9, 10
The coming of the lawless one will be accompanied by the working of Satan, with every kind of power, sign, and false wonder, . . .