Ignore uninformed usage rules. The injunction against adjectives and adverbs is up there with the never-use-the-passive-voice one. Why do these rules exist? To mollycoddle grammahooligans? To placate unimaginative writers? No, to facilitate clear communication. But, this may be one of the answers to a question of mine: what is the fascination (in the original etymological sense of the word) with and obsession in finding single words for some concept? The answer may be "so I can use a single word which I have to explain in the end leading to an argument ..." &c., &c.

Ceci n'est pas un seing.