No it's not. English word doctrine comes from the Latin docereto teach, show, point out.
So, because you are not aware of it I suppose it isn't so? Is that what you are saying?
Yeah, but Plato is not a normative authority of the Koine Greek. Koine Greek is Koine Greek, and doxa means this many things (from the Koine Greek lexicon):
opinion, judgment, view opinion, estimate, whether good or bad concerning someone in the NT always a good opinion concerning one, resulting in praise, honour, and glory splendour, brightness of the moon, sun, stars magnificence, excellence, preeminence, dignity, grace majesty a thing belonging to God the kingly majesty which belongs to him as supreme ruler, majesty in the sense of the absolute perfection of the deity a thing belonging to Christ, the kingly majesty of the Messiah, the absolutely perfect inward or personal excellency of Christ; the majesty of the angels, as apparent in their exterior brightness a most glorious condition, most exalted state of that condition with God the Father in heaven to which Christ was raised after he had achieved his work on earth the glorious condition of blessedness into which is appointed and promised that true Christians shall enter after their Saviour's return from heaven
Wouldn't it be an oxymoron for the Eastern Church to call itself orthodox (ortho+doxa), which according to the supreme authority of betty boop's knowledge of Koine Greek would literally mean the right-false opinion!!!? How pathetic.
There is never any right praise for ignorance either, especially in-your-face ignorance.
Inward where? What am I looking for? Do you even think these answers through, betty boop, or do you just reach to the shelf and throw at me whatever you can grasp?
And the Latin word "evolved" from the Greek.... Certainly the great masters of doxa in Plato's world the sophists were in the business of "teaching, showing, and pointing out." The problem for Plato was that what they were teaching, showing, and pointing out represented a radical departure from Truth.
Plato was a great literary artist and master of his language Koine before anybody even thought to analyze it.