An ambiguity in communicative intent. There’s the ominous question “Can we talk?” between intimates, conveying “Let’s talk!” — suggesting a subject that the recipient will find distressing. (“Can we talk?” is often an opener to a break-up speech or to personal criticism.) This has the can of permission.
Then there’s the can of ability: are we able to talk? This is a paradoxical question: the parrot produces something that sounds like an English question, about ability, but the ability in question is being able to produce utterances with intentions and to comprehend those intentions, and it’s unclear — indeed, very unlikely — that the parrot has this ability.