Cognition is always a dialectical relation between subject and object. Later Marx related this to the practice. This practice is an important point by Marx, often forgotten by mechanical materialists. In social science all scientists are concerned persons. Continuity and Discontinuity refer to the two aspects of matter manifested in discrete for me or, manifested in a continuum.
Nature exhibits the interchange between continuity and discontinuity.
Matter is in my opinion neither discrete nor continuos but a unity of the two aspects. Each thing is a whole - each thing is continuos and discontinuous. Maybe, you like this more than contradictory reality. If it is only forgetting them, the wholeness is a merely transient one. Materialism - Idealism Please don't confuse dialectical materialism with mechanical materialism.