And theory has something to do with that experience of sameness, in describing how this particular experience of an experimental object belongs within a particular field of possibilities of experience that are the possibilities of experience of the same object. Moreover, standardized practices can allow such phenomena to appear outside of the laboratory in the life-world where they can be used without theory, in such things as cigarette lighters, thermometers, and microwaves. Microwaves are not used abstractively but casually in ovens, radio waves in communication, and so forth. Second, scientific entities are brought into the world through an artistic process. They are not seen with Cartesian clarity.
Phenomena come to show themselves in scientific experimentation often via artistic skill.
Moreover, some scientific performances are so virtuosic as to be essentially unrepeatable. The environment of the working laboratory, by contrast, is anything but constant. Third, scientific entities are historically fragile. When the world changes, new scientific phenomena appear, certain existing scientific phenomena disappear, while most others show themselves in a new light. That would be to render incoherent the scientific world of the day.