Getting a sample from the model
	• If there are more than a few hidden units, we cannot compute the normalizing term (the partition function) because it has exponentially many terms. • So use Markov Chain Monte Carlo to get samples from the model: – Start at a random global configuration – Keep picking units at random and allowing them to stochastically update their states based on their energy gaps. • At thermal equilibrium,  the probability of a global configuration is given by the Boltzmann distribution.