"Is this mushroom edible?"

To be edible, mushrooms must be

Some people get sick anyway. Alcohol combined with certain species causes illness. A few people are sickened by allergies or unusual sensitivity. Be kind to your doctor–don't confuse him by eating several species at one sitting. Experts can help, but eating mushrooms (or any food) can never be entirely safe.

Dick Sieger, Olympic Peninsula Mycological Society, 2003