Jag är inte säker på att det kan finnas ett definitivt kanon svar på denna fråga.
The ways of the centaur are shrouded in mystery. They are generally speaking as mistrustful of wizards as they are of Muggles and indeed seem to make little differentiation between us. They live in herds ranging in size from ten to fifty members. They are reputed to be well-versed in magical healing, divination, archery, and astronomy.
Fantastic Beasts and Where to Find Them - page 6 - Scholastic - An A-Z of Fantastic Beasts
Betraktad betyder ska vara sådan , så det är möjligt att det finns ingen specifik förutsägelse att peka på i kanon som är av en centaur. Om jag hittar något, ska jag redigera det.
ETA: Jag kan inte hitta något som skulle göra ett bra exempel. I Philosopher Stone står det:
‘Good luck, Harry Potter,’ said Firenze. ‘The planets have been read wrongly before now, even by centaurs. I hope this is one of those times.’
Philosopher's Stone - page 189 - Bloomsbury - chapter 15, The Forbidden Forest
Firenze säger inte vad han ser på planeterna, men vi vet inte vad vi letar efter som en förutsägelse. Det verkar uppenbart att det har att göra med Harry och Voldemort, med Harry inte gynnad att segra. Sedan, i Phoenix-ordningen noterar Firenze följande:
‘In the past decade, the indications have been that wizardkind is living through nothing more than a brief calm between two wars. Mars, bringer of battle, shines brightly above us, suggesting that the fight must soon break out again. How soon, centaurs may attempt to divine by the burning of certain herbs and leaves, by the observation of fume and flame ...’
Order of the Phoenix - page 532 - Bloomsbury - chapter 27, The Centaur and the Sneak
Jag anser inte att detta kvalificerar sig som en förutsägelse i sig; vid tiden för Phoenix-ordningen , att ett annat trollkrig var överhängande var helt uppenbart. Om Firenze hade sagt detta i Filosofens sten , kan jag se på det annorlunda. Slutligen, i Phoenix-ordningen , konstaterar Firenze, i princip, att spådom bör tas med saltkorn.
Firenze told them to look for certain shapes and symbols in the pungent fumes, but he seemed perfectly unconcerned that not one of them could see any of the signs he described, telling them that humans were hardly ever good at this, that it took centaurs years and years to become competent, and finished by telling them that it was foolish to put too much faith in such things, anyway, because even centaurs sometimes read them wrongly. He was nothing like any human teacher Harry had ever had. His priority did not seem to be to teach them what he knew, but rather to impress upon them that nothing, not even centaurs’ knowledge, was foolproof.
Order of the Phoenix - page 532 - Bloomsbury - chapter 27, The Centaur and the Sneak
Jag tror att det som är närmast en förutsägelse är att ingenting är idiotiskt.