hyphens and adverbs (Say no!)
No because highly is an adverb and respected is an adjective , and adverbs are allowed to modify adjectives.
You need hyphens when two adjectives cannot be separated without changing the meaning.
For example: well known scholar….
Is he a well scholar? no
Is he a known scholar? yes
You must stick well to known to make them function as one adjective: well-known.
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You should not hyphenate any -ly adverb together with another word to make a compound.
Says The Chicago Manual of Style, “Compounds formed by an adverb ending in ly plus an adjective or participle (such as largely irrelevant or smartly dressed) are not hyphenated either before or after a noun, since ambiguity is virtually impossible. (The ly ending with adverbs signals to the reader that the next word will be another modifier, not a noun.)”
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So, it's "highly accurate".