Psychiatrist: While the first appearance of a phobia is usually preceded by a traumatizing event, not everyone who is traumatized by an event develops a phobia  Furthermore, many people with phobias have never been traumatized
These two considerations show that traumatizing events do not contribute to the occurrence of phobias
takes for granted that a type of phenomenon contributes to the occurrence of another type of phenomenon only if phenomena of these two types are invariably associated