Three designs set.

The fact that science follows the subject-matter in its own movement involves a further consequence: science differs from common knowledge in scope only, not in nature. When intelligence arises, when the flux of things begins to be mitigated by representation of it and objects are at last fixed and recognisable, there is science. For even here, in the presence of a datum something virtual and potential is called up, namely, what the given thing was a moment ago, what it is growing into, or what it is contrasted with in character. As I walk round a tree, I learn that the parts still visible, those that have just disappeared and those now coming into view, are continuous and belong to the same tree.
George Santayana, The Life of  Reason – The Phases of Human Progress, Volume V. REASON IN SCIENCE, Its continuity with common knowledge