What was one of the weaknesses of the Sherman Antitrust Act that made the law difficult to argue in court?

The Sherman Antitrust Act prohibited restraints of trade and attempts to monopolize, but it did not clearly define what counted as a trust or monopoly. That ambiguity made it difficult for courts to determine whether a business had violated the law. Therefore, the weakness was that the law did not adequately define trusts or monopolies.

AI-written and checked against the verified answer.