a <- b & g. b <- c & d. b <- e. c. d <- f. f.
One model is where c, f, d and b are true and a, e and g are false.
Another model is where every atom is true.
We can select an clause and falsify it, filling the other atoms arbitrarily. For example, the interpretion with a false and every other atom true falsifies the first clause and isn't a model.
Any two of c, f, d and b.
Any two of a, e and g.