After all, I almost, or at least have some hope of, understanding octonians. E8 is much further out there.
Surely, you jest or is it Shirley, you jest?
Is brain damage from strain cumulative?
If nothing else. staring at the E8 Petrie projection; was soothing.
... The Weyl group of E8, which is the group of symmetries of the maximal torus which are induced by conjugations in the whole group, has order 21435527 = 696729600....