Is it possible that the Bible has errors because of man's inaccurate memory? I noticed that some sayings of one event is different in different chapters.
1: the original manuscripts of which there are thousands of, are preserved by God for the purpose of maintaining the veracity of and access to his Word.
2: the original languages of these manuscripts is Hebrew and Greek of the times they were written. Translation into Latin, German and English by early scholars was done with the best of human efforts at fearfully and reverently handling the Word of God. Nevertheless some expressions of translation are affected by word choices and expressions available in the translators language. This does not invalidate the scholarship of the translation, but the reader understands that the Bible is brought to them through translation efforts.
3: the King Jame Version of 1611 is considered the most scholarly word for word translation that has stood the test of time - 400 years. But one should also have a copy of "Strong's Exhaustive Concordance of the Bible" either on computer or as a hard copy. This gives the reader access to every word in the original language and their original word usage. For example: Ye = you in the plural, and Thou is you singular. While in English we just use You mostly. Again Love is an interesting and very limited word in English. I love my pizza. I love my children. I love Jesus. One word many applications and meanings.
In the Scriptures the Hebrew and Greek express brotherly love and sacrificial love, or compassionate love. In John chapter 21, when Jesus asks Peter three times "Do you love me, Peter?" the English is one word but the Greek is of two different types of love.
John 21:15 So when they had dined, Jesus saith to Simon Peter, Simon, son of Jonas, lovest thou me more than these? He saith unto him, Yea, Lord; thou knowest that I love thee. He saith unto him, Feed my lambs.
John 21:15 SoG3767 whenG3753 they had dined,G709 JesusG2424 saithG3004 to SimonG4613 Peter,G4074 Simon,G4613 son of Jonas,G2495 lovestG25 thou meG3165 moreG4119 than these? HeG5130 saithG3004 unto him,G846 Yea,G3483 Lord;G2962 thouG4771 knowestG1492 thatG3754 I loveG5368 thee.G4571 He saithG3004 unto him,G846 FeedG1006 myG3450 lambs.G721
G25 agapaō ag-ap-ah'-o
Perhaps from ἄγαν agan (much; or compare [H5689]); to love (in a social or moral sense): - (be-) love (-ed). Compare G5368.
G5368 phileō fil-eh'-o
From G5384; to be a friend to (fond of [an individual or an object]), that is, have affection for (denoting personal attachment, as a matter of sentiment or feeling; while G25 is wider, embracing especially the judgment and the deliberate assent of the will as a matter of principle, duty and propriety: the two thus stand related very much as G2309 and G1014, or as G2372 and G3563 respectively; the former being chiefly of the heart and the latter of the head); specifically to kiss (as a mark of tenderness): - kiss, love.
4: Ivan Panin - professor in Harvard University Mathematics, and Languages from late 19th century to 1920s? - discovered
Bible Numerics -
whereby Panin published works on the amazing numerical values of the original Hebrew and Greek words being sealed by God to validate the inspired Word and to protect the original Canon from false interpolations and from Apocryphal writings.
Panin could show through mathematical patterns in the wording that not only indicated every single word as true and correct, but also the tense and the grammar. The arithmetic numbers we use today - 1, 2, 3, etc... - came to us from India through Arabia via the Crusaders.
Prior to that, letters of the alphabet were ascribed to indicate numerical values, in Hebrew, Greek and Latin. We are more familiar with the Latin values on traditional clock faces: But I am old enough to have been taught Roman Numerals in school I = 1; V = 5; IX = 9; X = 10; L = 50; C = 100
You can look up Bible Numerics and many of his works are still published by Berean Publishers of Canada.
5: Your original example of the cock crowing is really only a superficial discretion.
Before the cock crow, you shall deny me thrice...
Does not mean the cock crowed once only, and not twice as stated in Mark. I live in a large block adjacent to a neighbour who has free range roosters and hens. Believe me when I state that a rooster never crows just once. Before the cock crow would be a reference more on the fact that it would be early morning (dawn) and immediately prior to the expected cock crowing of the morning. It does not say that the cock crowed once, but rather when the cock will crow...
6: The four Gospels are deliberately written to reflect the four attributes of Jesus. hence variations to what is covered and how it is expressed.
Matthew is Jesus as the promised King; Mark is Jesus as the Servant; Luke is Jesus' humanity in real history; John is Jesus as God the Son.
7:
All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
That the man of God may be perfect, throughly furnished unto all good works. 2Timothy 3:16-17
8: The Word of God must be true as it is what all of humanity from the first to the last will be judged against. It defines sin and righteousness. It defines the correct way of a true relationship with our Lord Jesus as Saviour, and how we are reconciled to our Father in heaven. The Word of God cannot contain falsehoods otherswise Judgment by God would not be righteous and true.