even a fool may sometimes give good counsel
A yojijukugo proverb meaning that even a foolish person can occasionally have a good idea or give useful advice. Often used humbly about one's own suggestion.
As the saying goes, even a fool may sometimes give good counsel, so please hear my opinion as well.
His suggestion, though from an unlikely source, turned out to be surprisingly useful—truly a case of even a fool having a good idea.
Means 'even a wise man sometimes makes a mistake', the opposite perspective of 愚者一得.
A longer, more explicit version of the same proverb.
A yojijukugo derived from the Chinese proverb '愚者千慮、必有一得' (a fool, after a thousand thoughts, will surely have one good idea).