If a meat thermometer is poked into a steak, the steak' s temperature can be correctly assessed  Ttherefore, since Will does not have access to a meat thermometer, his steak' s temperature cannot be correctly assessed  If the steak' s temperature cannot be correctly assessed, that steak will be over- or undercooked
Ttherefore, Will' s steak will be over- or undercooked
If a dog is walked frequently, the dog will be healthy. Without health, a dog cannot be happy. Since Roger walks his dog frequently, his dog will be both healthy and happy.