Grammar yes, but sampling reaction with appropriate rates makes the choice of the next reaction a little harder than arbitrary selection. The time to each poss

Grammar yes, but sampling reaction with appropriate rates makes the choice of the next reaction a little harder than arbitrary selection. The time to each possible event must be drawn from the exponential distribution (https://en.wikipedia.org/wiki/Exponential_distribution https://en.wikipedia.org/wiki/Exponential_distribution), and the event with the smallest waiting time fires next.