also: よしわるし
noun
good or bad; right or wrong; quality; suitability
Used to evaluate whether something is good or bad, right or wrong, or of acceptable quality. Often appears in phrases like 良し悪しを判断する (judge the merits).
この案の良し悪しを判断するのは難しい。
It's difficult to judge the merits of this proposal.
何事にも良し悪しがある。
Everything has its good and bad points.
noun
having both merits and demerits; pros and cons
Emphasizes that something has both positive and negative aspects, rather than a simple good/bad judgment. Often used when weighing trade-offs.
この新制度には良し悪しがある。
This new system has both advantages and disadvantages.