One way you can detect a lie, is to know AND BELIEVE the truth.

Pro 26:16 The sluggard is wiser in his own conceit than seven men that can render a reason.

Things that can keep you from detecting lies:

1. You love the lie
2. You like how powerful the lie makes you feel
3. You would like to believe the lie even though you know it's not true
4. You have pleasure in unrighteousness
5. You are living in sin and don't want to repent
6. You hate someone else and believing the lie justifies you
7. You are seeking to justify your lifestyle
8. A "friendship" to you is more important than truth
9. You don't care enough about your real friends
10. You don't care about the damage the lie will cause including your own family
11. You only believe in appearances and believe that God doesn't care what is in your heart
12. You believe you can hide things from God
13. You don't believe that God will reward you for your beliefs
14. You don't care about the soul of the person telling you the lie

Lev 6:2 If a soul sin, and commit a trespass against the LORD, and lie unto his neighbour in that which was delivered him to keep, or in fellowship, or in a thing taken away by violence, or hath deceived his neighbour;

Lev 19:11 Ye shall not steal, neither deal falsely, neither lie one to another.

Num 23:19 God is not a man, that he should lie; neither the son of man, that he should repent: hath he said, and shall he not do it? or hath he spoken, and shall he not make it good?

1Sa 15:29 And also the Strength of Israel will not lie nor repent: for he is not a man, that he should repent.

Job 6:28 Now therefore be content, look upon me; for it is evident unto you if I lie.

Psa 119:69 The proud have forged a lie against me: but I will keep thy precepts with my whole heart.

Pro 14:5 A faithful witness will not lie: but a false witness will utter lies.

Isa 44:20 He feedeth on ashes: a deceived heart hath turned him aside, that he cannot deliver his soul, nor say, Is there not a lie in my right hand?

Isa 63:8 For he said, Surely they are my people, children that will not lie: so he was their Saviour.

Jer 27:10 For they prophesy a lie unto you, to remove you far from your land; and that I should drive you out, and ye should perish.

Jer 27:14+ Therefore hearken not unto the words of the prophets that speak unto you, saying, Ye shall not serve the king of Babylon: for they prophesy a lie unto you. For I have not sent them, saith the LORD, yet they prophesy a lie in my name; that I might drive you out, and that ye might perish, ye, and the prophets that prophesy unto you. Also I spake to the priests and to all this people, saying, Thus saith the LORD; Hearken not to the words of your prophets that prophesy unto you, saying, Behold, the vessels of the LORD'S house shall now shortly be brought again from Babylon: for they prophesy a lie unto you.

Jer 28:15 Then said the prophet Jeremiah unto Hananiah the prophet, Hear now, Hananiah; The LORD hath not sent thee; but thou makest this people to trust in a lie.

Jer 29:21 Thus saith the LORD of hosts, the God of Israel, of Ahab the son of Kolaiah, and of Zedekiah the son of Maaseiah, which prophesy a lie unto you in my name; Behold, I will deliver them into the hand of Nebuchadrezzar king of Babylon; and he shall slay them before your eyes;

Jer 29:31 Send to all them of the captivity, saying, Thus saith the LORD concerning Shemaiah the Nehelamite; Because that Shemaiah hath prophesied unto you, and I sent him not, and he caused you to trust in a lie:

Eze 21:29 Whiles they see vanity unto thee, whiles they divine a lie unto thee, to bring thee upon the necks of them that are slain, of the wicked, whose day is come, when their iniquity shall have an end.

Mic 2:11 If a man walking in the spirit and falsehood do lie, saying, I will prophesy unto thee of wine and of strong drink; he shall even be the prophet of this people.

Hab 2:3 For the vision is yet for an appointed time, but at the end it shall speak, and not lie: though it tarry, wait for it; because it will surely come, it will not tarry.

Zec 10:2 For the idols have spoken vanity, and the diviners have seen a lie, and have told false dreams; they comfort in vain: therefore they went their way as a flock, they were troubled, because there was no shepherd.

Joh 8:44 Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.

Act 5:3 But Peter said, Ananias, why hath Satan filled thine heart to lie to the Holy Ghost, and to keep back part of the price of the land?

Rom 1:25 Who changed the truth of God into a lie, and worshipped and served the creature more than the Creator, who is blessed for ever. Amen.

Rom 3:7 For if the truth of God hath more abounded through my lie unto his glory; why yet am I also judged as a sinner?

Rom 9:1+ I say the truth in Christ, I lie not, my conscience also bearing me witness in the Holy Ghost, That I have great heaviness and continual sorrow in my heart.

2Co 11:31 The God and Father of our Lord Jesus Christ, which is blessed for evermore, knoweth that I lie not.

Gal 1:20 Now the things which I write unto you, behold, before God, I lie not.

Col 3:9 Lie not one to another, seeing that ye have put off the old man with his deeds;

2Th 2:11 And for this cause God shall send them strong delusion, that they should believe a lie:
2Th 2:12 That they all might be damned who believed not the truth, but had pleasure in unrighteousness.