Assalamu alaykum warahmatullah.
1. What would be classified as Rational possibility & impossibility? Eg; for someone in the past the idea of communicating with another human being on the other side of the world without presence or in the form of letters would be rationally absurd. But in the modern day this is a contingent necessity.
2. When we say that Allah placing the effect in a cause is Bidah what does that mean? Eg; If a person says Allah has created & sustains the ability of satiation in the food & has placed that effect in it. Hence, it is a Normative ruling. Would this be Bidah?