I guess I'm on a Goblet of Fire kick today.
Anyhow, after Dumbledore disarms Crouch/Moody following the third task, Crouch Jr is left unconscious for a while; Dumbledore says this:
‘Severus, please fetch me the strongest Truth Potion you possess, and then go down to the kitchens, and bring up the house-elf called Winky.
Minerva, kindly go down to Hagrid’s house, where you will find a large black dog sitting in the pumpkin patch. Take the dog up to my office, tell him I will be with him shortly, then come back here.’
Goblet of Fire - pages 591-592 - Bloomsbury - chapter thirty-five, Veritaserum
Clearly Veritaserum is the strongest Truth Potion Snape has, because that is what he returns with. But does this mean there are other types of Truth Potions that maybe aren't as strong as Veritaserum, or that are more potent? Or is the text merely stating that there are different degrees of Veritaserum itself, and that it's maybe a potion that covers a spectrum of potency?
Are there other Truth Potions besides Veritaserum?