for the seer/mage thing, maybe a seer would know everything ABOUT the diamond (melting point, density, purity etc.) and a mage would know everything you can actually DO with it
well not really
the reason why Seer is basically “Knows all potentially knowable knowledge” and Mage is “Knows the Unknowable Knowledge” is because that is how Active and Passive are used in the context of Comprehension/ Knowledge/ Understanding
again, Active meaning you can force your aspect to do your function in a way that wouldnt naturally happen for that aspect.
Knowledge, naturally, can be learned, be understood, be discovered within certain limits. Our universe has 3 physical dimensions and 1 Time dimension that everyone in it can perceive and perceive with.
No matter how technology advance or what tools we come up with, we’re not going to be able to percieve and observe what a 4th physical dimension is gonna actually look like in its natural state, we can only ever get ideas of what it’s “3D shadow” might look like
for example this
is the fourth dimensional equivalent of this:
It’s a cube, that is not changing, but merely spinning, but drawn and rendered on a plane lower than what it is
A 3d Cube is 3 dimensional, just like the bottom gif, but the bottom gif itself is a 2d drawing, its not a cube, it is a literal shadow of a cube that only had edges and not faces as if you shone a light on it and this is what youd see on the flat 2d surface of the ground
the top gif is a 3d render of a 4rth dimensional cube merely spinning, just like the bottom one, but the 3d render isnt actually it, that’s what its shadow would look like if casted onto a 3d realm
its almost impossible to wrap your head around the concept, much less imagine what the real actual object must look like from every angle
so that’s the difference
A Seer can potentially learn what we can learn, they can understand the concept of the “3d shadow” of the 4th dimsenional object
A Mage can see the fourth dimensional object and know everything about it in its natural realm, literally knowledge that is 100% impossible and unknowable
that is them being Active in their knowledge, that is them breaking the rules of comprehension, they are, in a sense, forcing their aspect to give up knowledge that it wouldn’t naturally, in this universe, give up