He explained this as the experiment rule but this is simply a hypothesis. The way to strengthen it is if we remove the causal factor and the event doesnt happen. (remove heavy metals… that means that they dont have resistance to anything). This is what B does. Its not about the experiment but more about how we weaken and strengthen the hypothesis and its simply by doing the three causal rules. B says that if we remove heavy metals… bacteria is not resistant to anything. Meaning that if we have heavy metals, the bacteria does have resistance which strengthens the hypothesis/conclusion. a causes b. if A is gone and b doesnt happen that means a causes b.

okay i understand when the sentance uses the indicator "or" but what if the embedded sentences dont use "or" how are we supposed to simplify the embedded conditional. and the example he gives, to me is more of a normal conditional with a disjunction in the necessary position. why do we consider this an embedded conditional?

hey i am also taking it in june