The assumption is always that scribes added to the texts. Assuming they are honest, wouldn't it be more likely they accidently missed something then accidently put something in. Or if they are frauds, shouldn't Christians assume that orthodox Christians would be pious enough not to lie and to corrupt God's word and that heretics would be the ones to corrupt the texts. Especially since most of the sources of the CT came from the East, esp Alexandria where Christological errors flourished most notably Arianism.

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*Peter Gray* Elkins Park RPCNA

"Lord, I believe; help thou mine unbelief. " Mk 9:24
"The greatest thing we can desire, next to the glory of God, is our own salvation; and the sweetest thing we can desire is the assurance of our salvation. In this life we cannot get higher than to be assured of that which in the next life is to be enjoyed. All saints shall enjoy a heaven when they leave this earth; some saints enjoy a heaven while they are here on earth." Joseph Caryl