Some people believe there is intelligent life somewhere in the universe besides Earth  But no one who believes that could also believe all planets other than Earth are devoid of life
Thus, some people do not believe all planets other than Earth are devoid of life
Some cat owners believe cats are incapable of feeling guilty. Since one could think that an animal is capable of feeling guilty only if one thought the animal had a conception of morality, it follows that some cat owners do not believe cats have a conception of morality.