Actually, the 'two witness' rule is needed to prove adultery; the issue of remarriage after being given a scriptural divorce is a separate matter, since the innocent spouse risks committing adultery:
"Although the elders cannot tell the innocent mate that he is free to marry because adultery was not proved, in view of the circumstances, if the innocent mate is convinced that adultery did occur, the elders may allow him to take responsibility before Jehovah for obtaining a Scriptural divorce; if he remarries, no judicial action will be taken."
In essence they're making re-marriage a conscience matter, and actually not a matter for the judicial committee; so they're actually softening the hard-line position on divorce that comes straight out of Jesus' mouth, in Matthew 19:
Divorce
1 When Jesus had finished saying these things, he left Galilee and went into the region of Judea to the other side of the Jordan. 2 Large crowds followed him, and he healed them there.
3 Some Pharisees came to him to test him. They asked, “Is it lawful for a man to divorce his wife for any and every reason?”
4 “Haven’t you read,” he replied, “that at the beginning the Creator ‘made them male and female,’ 5 and said, ‘For this reason a man will leave his father and mother and be united to his wife, and the two will become one flesh’ ? 6 So they are no longer two, but one flesh. Therefore what God has joined together, let no one separate.”
7 “Why then,” they asked, “did Moses command that a man give his wife a certificate of divorce and send her away?”
8 Jesus replied, “Moses permitted you to divorce your wives because your hearts were hard. But it was not this way from the beginning. 9 I tell you that anyone who divorces his wife, except for sexual immorality, and marries another woman commits adultery.”
Jesus said nothing about if the mate was convinced their spouse had committed adultery, and thus would stand before God; it still needs to be proven.
Note in verse 8 that Jesus doesn't say that Moses was all wet, but instead blames the Israelites (and the ones he's talking to) by suggesting they were stoopid (sic), so basically Jesus is patronizing them (and also not responding to the question asked). Jesus didn't shift from the Genesis position, but notice how he allows divorce for adultery, a concept NOT found in Genesis; Jesus appeals to his own authority to update the policy on divorce!
10 The disciples said to him, “If this is the situation between a husband and wife, it is better not to marry.”
Jesus' disciples are asking if it's best just not to get married in the first place, since someone cannot get divorced for whatever reason they wish (as under Mosaic law) without facing getting stoned for adultery. Jesus tactily agreed when he acknowledged what they suggested:
11 Jesus replied, “Not everyone can accept this word, but only those to whom it has been given. 12 For there are eunuchs who were born that way, and there are eunuchs who have been made eunuchs by others—and there are those who choose to live like eunuchs for the sake of the kingdom of heaven. The one who can accept this should accept it.”
So there it is: from Jesus' own words, it's better to remain celebate and single, and pass entirely on marriage and live like a eunuch! JWs picked up on that, since you've gotta put Kingdom interests first, per Jesus! Clearly sex is for those spiritual weaklings who cannot suppress and control their fleshly urges....
Ahhhh, the timeless wisdom of Jesus, and the family values on the life of a eunuch display....
JWs actually DO interpret the original message of Jesus more accurately than other Xian religions, but it's amazing that anyone lives their lives according to the dictates of some 2,000 yr old legal principles.
Adam