We show that such deformations still exists after quotienting out by diffeomorphisms only if the non linear addition is non associative..

Well then, what's do wi' thee ; for thou's lookt o mornin as yonderly as if thou'd lost th' guiders o' thy een ?

But Mr. Eighner was such an agreeably yackety companion that his plight sometimes felt abstract.

Yes, but what are the tangibles?