Before the rooster crows TWICE, you will deny Me three times

[tonychanyt]

Matthew 26:

34 “Truly I tell you,” Jesus answered, “this very night, before the rooster crows, you will disown me three times.”

Luke agreed in 22:

34 But Jesus replied, "I tell you, Peter, the rooster will not crow today until you have denied three times that you know Me."

But then, in Mark 14:

30 "Truly I tell you," Jesus replied, "this very night, before the rooster crows twice, you will deny Me three times."

Is there a contradiction?

Well, not exactly. Matthew and Luke did not say: before the rooster crows once. So, there is no formal first-order logical contradiction. Strangely, Matthew and Luke didn't bother counting the first crow. Perhaps they skipped that and focused only on the second crow, which was the primary crow.