  Information pooling has been extensively formalised across various logical
frameworks in distributed systems, characterized by diverse information-sharing
patterns. These approaches generally adopt an intersection perspective,
aggregating all possible information, regardless of whether it is known or
unknown to the agents. In contrast, this work adopts a unique stance,
emphasising that sharing knowledge means distributing what is known, rather
than what remains uncertain. This paper introduces new modal logics for
knowledge pooling and sharing, ranging from a novel language of knowledge
pooling to a dynamic mechanism for knowledge sharing. It also outlines their
axiomatizations and discusses a potential framework for permissible knowledge
pooling.
