It is not true that it takes a fool to know a fool. It takes knowing what the Word of God says about fools to identify a fool, Pacer. The scriptures are clear that wise men and women will be able to identify them. Here is a partial list, for the full list click the link below:
It is Written:
III. A FOOL IS REVEALED BY HIS SPIRIT---Proverbs 14:16 A wise man feareth, and departeth from evil: but the fool rageth, and is confident.
A. A FOOL HAS A STOUT (HAUGHTY, PROUD) SPIRIT---Proverbs 28:26 He that trusteth in his own heart is a fool: but whoso walketh wisely, he shall be delivered. Prov. 14:3 In the mouth of the foolish is a rod of pride: but the lips of the wise shall preserve them.
* A fool promotes himself; a wise man humbles himself and lifts up Jesus!
B. A FOOL HAS A STUBBORN SPIRIT---Proverbs 12:15 The way of a fool is right in his own eyes: but he that hearkeneth unto counsel is wise.
* A fool is stubborn; therefore, he is not teachable. Proverbs 15:5 A fool despiseth his father's instruction: but he that regardeth reproof is prudent. Proverbs 23:9 Speak not in the ears of a fool: for he will despise the wisdom of thy words.
* A fool is stubborn in rejecting the truths of the Bible about salvation, about service, about sin and separation, about service.
C. A FOOL HAS A SWIFT SPIRIT---Proverbs 13:16 Every prudent man dealeth with knowledge: but a fool layeth open his folly.
* A wise man is swift to hear, but slow to speak, slow to get angry, and slow to make a decision that requires contemplation:
* As I quoted about a fool's speech: Proverbs 29:20 Seest thou a man that is hasty in his words? there is more hope of a fool than of him.
* Proverbs 19:2 Also, that the soul be without knowledge, it is not good; and he that hasteth with his feet sinneth.
D. A FOOL HAS A STRIVING SPIRIT---Proverbs 20:3 It is an honour for a man to cease from strife: but every fool will be meddling.
* A fool gets into arguments all the time.
E. A FOOL HAS A SEETHING (SOON-ANGRY) SPIRIT
* Eccl. 7:9 Be not hasty in thy spirit to be angry: for anger resteth in the bosom of fools.
* Proverbs 12:16 A fool's wrath is presently known: but a prudent man covereth shame.
http://www.jdarrenduncanministries.com/outlines/How_A_Wise_Man_Spots_A_Fool.htm
I thought Darren Duncan did a very good work with that outline. I trust it will be helpful to some people who read it although not everyone because............
It is written:
Understanding is a wellspring of life unto him that hath it but the instruction of fools is folly.
Proverbs 16: 22