Qada also has two main branches: pure Qada and Qada resembling Ada. Pure Qada has two kinds:
• A rationally recognizable equivalent (Mithl Ma'qul): the resemblance to the original act is understandable, as when a prayer is made up with another prayer.
• A scripturally established equivalent (Mithl Ghayr Ma'qul): Shariah appoints the substitute although the acts are not alike in a way reason alone establishes. The example is fasting and its appointed Fidya of feeding.
Fasting is abstaining from food; feeding is giving food. Their equivalence is not invented from physical similarity. This comparison does not say that everyone may replace fasting with feeding.
- Two Ways an Equivalent Is Established