The Quran actually Proves the validity of the TRINITY.

Submitted by Shinto (Canada), Aug 14, 2007 at 23:13

What I have realized is that a lot of islamic scholars are not that very smart. I've seen them twist Surah's into making assumptions that The Quran predicted the advent of certain scientific events (all but debunked)
ابن مريم رسول الله وكلمته ألقيها إلى مريم وروح منه فءامنوا بالله ورسله ولا تقولوا ثلثة انتهوا خيرا لكم إنما الله إله وحد سبحنه أن يكون له ولد له ما في السموت وما في الأرض وكفى بالله وكيلا

Ya ahla alkitabi la taghloo fee deenikum wala taqooloo AAala Allahi illa alhaqqa innama almaseehu AAeesa ibnu maryama rasoolu Allahi wakalimatuhu alqaha ila maryama waroohun minhu faaminoo biAllahi warusulihi wala taqooloo thalathatun intahoo khayran lakum innama Allahu ilahun wahidun subhanahu an yakoona lahu waladun lahu ma fee alssamawati wama fee al-ardi wakafa biAllahi wakeelan

4.171 You The Book's family, certainly do not go beyond the limits in your faith, and they do not say on "allah" except The Truth (is) only The Messiah Jesus, Mary's son, "allah's" messenger, and his Word, cast forth to her, Mary, and Spirit from him; so believe on account of "allah", and His messengers, and certainly they say: "Three." Refrain (it is) agreeable certainly your only "allah" one god glory be to him, that He has certainly been his Son, truly his what in the heavens and in the earth and He sufficed on account of "allah", a witness.

ثة = "thalathatun" (Things that are numbered) of 3, aka Trinity or the Triun.

source: http://www.wikiislam.com/wiki/The_Trinity

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