  For any group $G$ with subgroup $H$ and a set of representatives $T$ from the
set of cosets $G/H$, we develop a rewriting system from $G$ that bequeaths a
product into the set decomposition $T\times H$ of $G$, converting it into a
group. In return the rewriting system also describes any product between
elements in $G$ in terms of elements from $T$ and $H$, while we gain a new
universal group-isomorphism between $G$ and $T\times H$. From this framework,
we develop the theory of Diffracted Groups.
