The * operator is a argument unpacking operator in python (see
https://docs.python.org/3/tutorial/controlflow.html#unpackin... )
z3.Or(*answers[:4])
is the same as
z3.Or(answers[0], answers[1], answers[2], answers[3])
Of course it can be re-written more generically, but I thought it would be less explicit in this example
import z3
answers = [z3.Bool(f"answer{i}") for i in range(1,7)]
implications = [
z3.And(answers[1:]), # All of the below
z3.Not(z3.Or(answers[2:])), # None of the below
z3.And(answers[:2]), # All of the above
z3.Or(answers[:3]), # Any of the above
z3.Not(z3.Or(answers[:4])), # None of the above
z3.Not(z3.Or(answers[:5]))] # None of the above
# An answer should be True if and only if its "implication" is true
constraints = [ans == impl for ans, impl in zip(answers, implications)]
solver = z3.Solver()
solver.add(constraints)
# Print all solutions
while solver.check() == z3.sat:
solution = solver.model()
print(solution)
solver.add(z3.Or([variable() != solution[variable] for variable in solution]))