Critical distinction: achronological narration (not specifying order) vs. dischronological narration (deliberately changing order). The former is uncontroversial; the latter requires heavy burden of proof. "Mere difference hunting" is not sufficient evidence for fact-changing.

Achronological narration: Luke grouping Jesus's prayer teachings together without claiming chronological order — uncontroversial, low burden of proof. Dischronological narration: deliberately making an event appear to happen at a different time (e.g., John allegedly moving the temple cleansing) — requires much more evidence. McGrew's standard: "mere difference hunting" (finding differences between accounts) is not enough to prove fact-changing. Even "apparent discrepancy hunting" isn't enough because you must first ask whether there's a plausible harmonization. Many alleged literary devices reduce to assuming discrepancy when reconcilable variation is available.