The specific behavior implied by the dental wear pattern.

“Earliest recorded” — the oldest in the direct physical record, not necessarily the actual oldest.

The word “recorded” is an important qualifier.

“Evidence” — the claim is about what the evidence shows, not about certainty.

“Habitual” — not casual or occasional, but sustained and repeated.

“Neuroactive” — not merely psychoactive but specifically acting on the nervous system, with a specific pharmacological mechanism.

“Plant drug” — not a fermented beverage, not a processed compound, but a plant whose natural chemical composition produces effects when the plant itself is consumed.

The precision of the title reflects the care of the underlying science.