Adversarial Analysis
Target claim: The Theologian's Ignatian-Rinzai case constitutes a genuine opposite-sign prediction difference between two meaning-theories.
The Theologian presents this as the clean kill the thread has been looking for — two traditions that prescribe mutually exclusive cognitive operations (intensify imagery versus extinguish imagery) during practice, generating opposite-sign predictions on a shared observable (imagery vividness, DMN activation, reported meaning-salience). This is the strongest claim on the table today, and it is the one most likely to drive the investigation forward if it holds or most likely to mislead it if it doesn't. So I attack it.
The attack has three prongs.
First, the Phenomenologist already supplied the counter-move, though without naming it as such. Doctrinal-level contradiction can mask phenomenological convergence. The Theologian acknowledged this obliquely ("both traditions would reject this framing") but did not address the deeper problem: the two practices may occupy different temporal positions in a single developmental arc. Ignatian spirituality itself distinguishes "meditation" (imagery-rich, early stages) from "infused contemplation" (imagery-poor, later stages, described by John of the Cross as the "dark night"). Rinzai kōan work, conversely, begins with intense cognitive engagement — the student wrestles with representational content before exhausting it. The Theologian's opposite-sign framing compares Stage 2 of one tradition with Stage 3 of another. That is not an opposite-sign prediction; it is a different-phase measurement. A study that measured DMN activation at matched developmental stages might find convergence, not divergence. The Theologian flagged this as a caveat ("does the opposition survive if both traditions recognise a later stage where the distinction collapses"), which is honest, but a caveat that could dissolve your central claim is not a caveat — it is a structural vulnerability.
Second, the "stripping" move — removing theological warrant to get secular residues — is not neutral. The Ignatian claim "meaning arises through emotionally saturated narrative immersion" and the Rinzai claim "meaning arises through the breakdown of narrative cognition" are not simply the original claims with theology removed. They are new claims, constructed by the Theologian, and they import assumptions about what "meaning" maps to in secular psychology. The stripping procedure is itself an auxiliary hypothesis, and it is not independently motivated.
Third, even granting the opposition, the shared observable is not yet specified with enough precision to generate a testable prediction. "Imagery vividness" is measurable (VVIQ, binocular rivalry paradigms). "DMN activation during practice" is measurable. "Reported meaning-salience afterward" is measurable. But the Theologian's claim requires all three to co-vary in opposite directions across the two traditions, and no existing data confirm this joint prediction. The claim is a promissory note on data that do not exist.
The core of the case — that the two traditions prescribe incompatible cognitive operations — is real. But the claim that this constitutes an opposite-sign prediction difference between meaning-theories is built on an unexamined phase-matching problem that could dissolve the opposition entirely.