Using the correction of a vector field to characterize isochronicity and explicit computations of this quantity for polynomial vector fields, wa are able to describe a very large class of nonisochronous Hamiltonian system of even degree of degree arbitrary large.

When the black purga blows it can pile the snow higher than a ship's mast overnight.

Thou knowest not how came ye, hence callest thyself unbegotten; certainly knowest not thy beginning, hence callest thyself unbegun.

We propose a Lattice Weak Gravity Conjecture that meets this requirement: a superextremal particle should exist for every charge in the charge lattice.