Final answer:
The 'ratio' in Druet v. Girouard refers to the ratio decidendi or the legal principle of the case, which can't be determined without additional information.
Step-by-step explanation:
The term 'Druet v. Girouard' seems to refer to a legal case. The ratio in a legal context typically refers to the ratio decidendi, which is the legal principle or reasoning underlying a court's decision in a given case. However, without further context, it's challenging to provide specific details regarding the ratio decidendi for the Druet v. Girouard case. To provide a helpful answer, additional information about the jurisdiction or nature of the case would be necessary. This could refer to a country's legal system or a particular field of law, and the case might involve Civil law, Family law, Commercial law or any other specialized legal field.