two adjectives modifying each other

0Hi,02br
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00In one of the replys given in response to one of the inqueries, it seems to have stated that when two adjectives modify each other and not the noun, no comma is necessary to separate and to do that one would (must?) use an adverbial form of adjectives like "a happily married couple."02br
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00OK, but there are numerous incidences where two or three adjectives are modifying each other or for other grammatical reasons I am not familiar with will require the inclusion of a comma or commas to separate the adjectives. And those cases do not involve the usage of adverbial forms of adjectives like "happily." Right?02br
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00Can you consolidate my understanding with some examples of these and the explanations to follow.0-