Abstract Scientific discovery is usually narrated from the far side of breakthrough, after a phenomenon has been detected, a platform validated, a theory operationalized, or a field reorganized. This paper examines the less visible interval before such closure, when the object of inquiry is still unresolved, contested, undetectable, technically fragile, or not yet institutionally receivable. Drawing on a qualitative theory-building corpus of fifteen profiles across five long-arc scientific domains (cosmology and gravitational physics, biomedical platform science, consciousness science, climate science, and assembly theory and origin-of-life research), it develops the construct of scientific holding. Scientific holding is the disciplined preservation of recognition, relevant features, and alternatives under pressure toward premature closure. Across the corpus it appears not as passive waiting or heroic persistence but as a conversion-before-closure discipline through which the not-yet-known is kept available long enough to become workable: anomalies become durable patterns, predictions become instrument-building problems, technical barriers become modifiable mechanisms, and projected futures become communicable risks. The paper makes four linked contributions. It defines scientific holding as an epistemic discipline; develops workability as the missing middle between unresolved encounter and settled knowledge; extends the Progress Principle by showing that progress functions as epistemic-motivational feedback, not only encouragement; and reframes threshold crossing as varied scientific movement rather than breakthrough alone. Their sharpest practical implication is for those who form scientists: if discovery depends on conversion before closure, research education is not only training in method and output but the formation of researchers able to remain in disciplined contact with the not-yet-known. More generally, the institutions of science should be judged not only by what they can prove, publish, or commercialize, but by what they can preserve long enough to become knowable. Keywords: scientific holding; workability; pre-discovery interval; threshold crossing; scientific discovery; basic research; big science; history and philosophy of science; science and technology studies; progress principle; infrastructures of attention; research education; peer review; scientific research; research leadership
David S Morgan (Thu,) studied this question.