“Highly unlikely but not impossible.”

“if being is many, it must be both like and unlike, and this is impossible, for neither can the like be unlike, nor the unlike like”

“It is most unlikely. But--here comes the big "but"--not impossible.”

“Gardening is about cheating, about persuading unlikely plants to survive in unlikely places and when that trick is well accomplished the results can be highly satisfying.”

“So my antagonist said, "Is it impossible that there are flying saucers? Can you prove that it's impossible?" "No", I said, "I can't prove it's impossible. It's just very unlikely". At that he said, "You are very unscientific. If you can't prove it impossible then how can you say that it's unlikely?" But that is the way that is scientific. It is scientific only to say what is more likely and what less likely, and not to be proving all the time the possible and impossible.”

“The impossible is more believable than the highly improbable.”