A chemical reaction is decomposition and sometimes synthesis.
A movement is repulsive and sometimes attractive.

It was the epoch of double replacement, it was the epoch of single replacement, it was the season of synthesis, it was the season of decomposition.
It was the epoch of destination, it was the epoch of origin, it was the season of attractive, it was the season of repulsive.

A q1n is q1r and sometimes q1e.
A q1n is q1r and sometimes q1e.

It was the epoch of q1o, it was the epoch of q1s, it was the season of q1e, it was the season of q1r.
It was the epoch of q1o, it was the epoch of q1s, it was the season of q1e, it was the season of q1r.