When you go into a court of law, you get two pleas. Guilty or not guilty. You’re told to tell the truth, the whole truth and nothing but the truth.
Because we’re human and in a human court there is the “addition” of not guilty by reason of such and such. Guilty, but legally justified in the eyes of man.
However, with God there is no such thing as guilty but justified.
Jesus said that if you deny Him in front of man, He will deny you in front of the Father. In Revelation it says the saints confessed with their mouth and did not love their lives unto death.
With regard to confession and denial, they are the same as guilty or not guilty in the eyes of God.
To deny is to not confess, lie or lie by omission.
According to the definitions below there either is confession or denial.
It’s difficult sometimes as a Christian to confess this to someone if we know as soon as it’s said the person will discredit anything said thereafter. However, the Bible says specifically to confess. There is no account in the scriptures of someone who claimed to be a Christian going to teach about Jesus and not saying they were His follower. Anything less than full disclosure is lying. Worse yet, subterfuge. If we try to minister to, or share the Gospel with, someone and do not at the onset say we believe in Jesus as God, then we are being deceitful.
It sounds harsh, but God said no liars will inherit the Kingdom of God. Neither will cowards, the vile, idolaters, those who are sexually immoral, etc.
We must be prepared to be rejected, especially because of Jesus. But if we believe in Jesus as God, then we live by His truth of not lying and will confess Him before man, even if it ends up the person(s) automatically discredits what we say.