Qiyas refers to analogical reasoning in Islamic jurisprudence used to derive rulings for new situations not explicitly addressed in the Qura...
Qiyas refers to analogical reasoning in Islamic jurisprudence used to derive rulings for new situations not explicitly addressed in the Quran or Sunnah by drawing analogy with existing rulings. For example alcohol was prohibited in the Quran so drugs are prohibited by Qiyas because they share the common cause of intoxication.