The indefinnite article and numbers are not used with non-countable nouns, such as advice.
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PhilipThe indefinnite article and numbers are not used with non-countable nouns, such as advice.So, he has a good knowledge of English is wrong?[:^)]
Could it be that the use of the indefinite article with non-countable nouns is poetic? We can talk about "a greater love" or "a greater mischief" with poetic license or because poetic license has made the expression common.