Every research tradition contains what its practitioners cannot see. This is not metaphor for ignorance; it is a structural feature of how traditions function. A tradition that held all its assumptions open to simultaneous scrutiny would be paralyzed. The capacity to take certain things for granted, to treat certain commitments as settled so that attention can be directed to the problems that remain unsettled, is what allows a tradition to be productive. The cost of that productivity is blindness to the assumptions that enable it. Laudan's reticulated model formalizes what Segal's fishbowl metaphor captures phenomenologically: at any given moment, some commitments are background, and the effort of making background visible — pressing one's face against the glass to see the world beyond the water's refractions — is the hardest intellectual work any tradition can undertake.
The AI transition has cracked multiple fishbowls simultaneously. The epistemological fishbowl of authorship — stable for centuries, adequate to copyright law and academic credit — cracks when Segal's collaboration with Claude cannot be cleanly decomposed into human and machine contributions. The economic fishbowl of software valuation cracks in the Death Cross when a trillion dollars of market value migrates in weeks. The pedagogical fishbowl of assessment cracks when students can produce essays indistinguishable from understanding without the understanding the essay is supposed to demonstrate.
In each case, the tradition faces the same structural choice. It can expand — modifying its assumptions to accommodate what the new evidence reveals — or it can retreat, defending the fishbowl's walls against the pressure of cracks. The retreat response preserves coherence at the cost of relevance. The expansion response preserves relevance at the risk of incoherence if the expansion goes too far.
Laudan's framework distinguishes progressive from degenerative responses. A progressive expansion increases problem-solving capacity while preserving the tradition's ability to make meaningful distinctions. A degenerative expansion abandons the distinctions that made the tradition useful in the first place — accommodating every anomaly by declaring every distinction optional. A progressive retreat focuses the tradition on the problems it solves well and acknowledges the domains where other traditions do better. A degenerative retreat refuses to acknowledge any tradition's limits and defends its fishbowl against all comers.
The AI transition requires expansion across multiple fishbowls simultaneously, and the quality of these expansions is the primary determinant of whether individual traditions — of authorship, of economic analysis, of education, of professional identity — emerge from the transition stronger or weaker. Progressive expansion is the work of generations. The discourse has barely begun.
Invisibility is structural. Traditions cannot function without background assumptions they cannot see.
Cracks force the choice. When evidence contradicts assumptions, the tradition must expand or retreat.
Progressive expansion is difficult. Modifying assumptions without losing coherence requires substantive judgment.
Degenerative retreat is easy. Defending the fishbowl against pressure preserves identity at the cost of relevance.