I am not sure if the following answers your question but I'll say it anyway. Some grammarians don't distinguish between verbal nouns (= complete nouns formed from verbs with the ing ending) and gerunds (= words that are neither verbs nor nouns but resemble both to some extent). Some apply the term "gerund" to both of them.
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AnonymousWould you say the phrase "an unusally hard laying aside of something" is a case of a verbal noun with an indefnite article -- making an instance of differentiation?As I said, various terms are used. In my classification a gerund can't take an article (a, an, the) or an adjectival attribute