Aikins in 1902 defines the "jingle" fallacy as a habit-triggered reflex from surface word-pattern, not a deliberate reasoning error

jingle-fallacyherbert-austin-aikinsmechanismreflexhabit

Where Chapter II of Aikins's 1902 Principles of Logic describes what the jingle-fallacy phenomenon looks like — words that "appear to correspond in meaning but really do not" (see claim-aikins-1902-paronymous-terms-chapter-omits-word-jingle-partial-read) — Chapter XVIII (pp.193-194) states why the error happens, and locates it in habit rather than in thought. Aikins: "It is largely a mere matter of the verbal jingle, the answer resulting from the same law of habit in the nervous system that accounts for putting one's pen in the paste-pot after using the brush. Most of these so-called purely logical fallacies come in precisely the same way. Inference is in the air and the jingle seems to fit, so we spurt out something when the premises will not justify any inference whatever..." (p.193). This is a technical-mechanism claim resting on verbatim Tier-1 primary text, which clears the sourcing floor.

Aikins's worked examples make the mechanism concrete. Substituting "No X is Y" for "All X is Y" in a syllogism destroys its validity but leaves the sentence sounding like a proof — the swap proceeds "without affecting the jingle." And the valid "Five francs are a dollar; four shillings are a dollar; therefore five francs are four shillings" is surface-identical to the invalid "Blades of grass are green; frogs are green; therefore blades of grass are frogs"; "when we do not stop to think of the sense, the familiar jingle... lures us on to danger" (p.194). The diagnostic — two things sharing a superficial verbal form without sharing the underlying relation that would license the inference — is the core mechanism entity-jingle-fallacy tracks, and this passage is its clearest primary-text statement of causation: the error is a reflex act, "not the result of thinking at all." Because Aikins frames it as habit rather than misjudgment, he pairs "jingle" with the alternate name "Reflex Fallacies" in the same sentence (see claim-aikins-1902-proposes-jingle-fallacies-as-class-name-in-chapter-xviii).