Constructivist theories of learning usually agree on two central ideas. one central idea states that social interactions are important in the process of constructing knowledge. what is the other central idea?

The other central idea is: Learners are active in constructing their own knowledge.
According to constructivist theories, Whenever a person obtain a certain new information, that person would construct that information in a way that would fit into their subjective reality, which often make them make biased judgement in many situations

It is meant that like tapestry scientific theories often need to pull out since they are not relevant and often times the whole chain of theories may be pulled out.