Hi guys, I've noticed that there are many structural problems with some Transfiguration spells and how they are perceived. For examples, there is a Teapot to tortoise spell which effect is supposedly "Transforms a teapot into a tortoise" because in the books it says In Transfiguration, students had to transfigure a teapot into a tortoise, which most found difficult (Prisoner of Azkaban, Chapter 16).
While the students did practice the spell on a teapot to change it into a tortoise, it's not written anywhere that the spell only works on a teapot. What I mean is that the spell is most likely to turn anything into a tortoise. We know that Transfiguration works better with targets of similar shape: Match to needle, Mice to Snuffboxes, Beetle Buttons, Rabbit Slippers, Owl to opera glasses and Porcupine to Pin Cushion.
Unfortunately I believe we don't have a single spell incantation from the books, but the video game have plenty of incantations what suggest so: all -fors suffix spells indicated that they will turn any target into a specific object or animal. Some spells, like Lapifors Spell or Avifors Spell already state that they work on all targets (although it's easier one target of similar shape).
That's why in my opinion Teapot to tortoise and Teacup to tortoise are actually the same spell (transform something into a tortoise), rather than two different spells. Also, logically it wouldn't make sense to have an infinite numbers of Transfiguration spell for each animal/object combination (chalice to tortoise, glass to tortoise, plate to tortoise, fork to tortoise, rope to tortoise, chair to to tortoise, snake to tortoise and so on.)
PS: Even if my explanation doesn't make sense to you, we have to agree that In Transfiguration, students had to transfigure a teapot into a tortoise, which most found difficult doesn't state that Teapot to tortoise only works on teapots, so at least it should say on that page and similar spells pages (like Match to needle) that it can work on teapots but maybe on other objects as well. --Exephyo (talk) 20:53, May 16, 2018 (UTC)