 Solution

Nonhuman animals retain information about particular past events, but this does not by itself establish human-like conscious recollection. The answer depends on what the category episodic memory requires. Knowing that an event happened differs from reliving it as something that happened to oneself. A species could possess useful event representations without satisfying every phenomenological criterion used in human research.

Endel Tulving's 1985 account makes autonoetic consciousness central: the rememberer apprehends the self in subjective time. This distinguishes episodic remembering from semantic memory, in which knowledge can be available without recollecting its acquisition. It is an influential theoretical proposal, supported by human observations and tasks, rather than an experiment establishing that every nonhuman species lacks that awareness.^[ref]

The measurement problem is substantial. A verbal human report can distinguish knowing from remembering, although it is also vulnerable to instructions and interpretation. An animal's correct choice cannot supply the same report, and a failed verbal test would be inappropriate to its capacities. Thus absence of a linguistic demonstration is not evidence of absence of experience. Conversely, sophisticated behavior should not simply be renamed conscious reliving: trained rules, relative familiarity or a combination of independent cues may sometimes solve the task.

Converging evidence can narrow this uncertainty. Retaining a trial-specific combination, using it flexibly under an unexpected query, and distinguishing earlier from later events are stronger functional criteria than repeating a well-trained response. Hippocampal lesion effects that spare perception or simple item recognition further constrain the mechanism. Yet even a convincing functional resemblance does not uniquely decide whether subjective temporal self-awareness accompanies it. Anatomical similarity is supporting evidence about mechanisms, not a direct measure of private experience.

A defensible position therefore separates the phenomenon from the inference. If episodic memory is defined functionally as flexible memory for individual events and their relations, evidence from animals can support it. If the definition necessarily includes autonoetic consciousness, the same evidence leaves a further question unresolved. The available evidence supports substantial continuity in event-memory capacities, while remaining insufficient for an unqualified claim that animals consciously relive episodes in the human sense. That conclusion expresses a measurement limit rather than a claim that animal consciousness is impossible.