A logical and sound deduction or necessary consequence from the instructions in several verses of Scripture (Deut. 4:2, Deut. 12:32, Prov. 30:6, Rev. 22:18-19) would indicate and affirm that copies would need to be carefully examined, searched, tried, or evaluated to make sure that no additions were made, that nothing was omitted, that no words were changed, and that the meaning of words according to their context was not diminished. The truth stated in these verses could be properly understood to indicate that whatever adds to, takes away, or diminishes (whether intentional or unintentional) would not be the word of God.
These scriptural instructions and truths provide sound guidance concerning how to know the words which the LORD has or has not spoken (Deut. 18:21, Jer. 23:16, Jer. 23:35, Ezek. 22:28).
Would words that go beyond those words that God actually gave to the prophets and apostles be considered the actual pure words of God (Num. 22:18)? There is such a thing as the possible adding of words in copies or in Bible translations. It can be properly concluded from the Scriptures that God has not directly spoken words added by men and that any words omitted by copiers should be restored (Deut. 4:2, Deut. 12:32, Prov. 30:6, Rev. 22:18). According to scriptural truth, words added by men cannot soundly be considered as being words given by inspiration of God.
Since the law or word of the LORD is perfect (Ps. 19:7, James 1:25) and since perfection by definition would exclude the presence of even one imperfection, would imperfect renderings made by men or any errors introduced by men be identical to the perfect words of God given to the prophets and apostles?
Since the statues or words of the LORD are right (Ps. 19:8, Ps. 33:4) and since the words of God are true (Ps. 19:9, John 17:17, Ps. 119:160, Dan. 10:21), it can be soundly and scripturally concluded that any wrong words or errors introduced by imperfect men would not be the absolutely pure words of God. It can be also properly concluded that any errors introduced by men in copying, in printing, or in translating are not words spoken or given by God. Any error introduced by a copier, printer, or whomever in copies and in Bible translations can be and should be corrected. It could also be soundly concluded that any words perverted, diminished, or mistranslated by men are not actual words spoken by God (Jer. 23:36, Deut. 4:2, Jer. 23:28, Deut. 12:32, 2 Cor. 2:17, Jer. 23:16, Jer. 26:2).