Mike and Susan left.
Either Karen or Lucy will sing.
John cannot paint my house again.
If Nadia is good, she can have ice cream.
Bill gets paid only if he finishes cutting the grass.
Neither Plato nor Socrates could drive a car.
It's false that both LaMark and Darwin were wrong.
It's not the case that I carry my umbrella only if it rains.
Some people are irritable.