When there is only a single consumer, a poison message can completely block processing of the queue.

Let us take ketchup for instance. Is there such a thing as banana ketchup or papaya ketchup so that we have to define ketchup as containing so much percent of tomato and nothing more?

the parting Sun/ Beyond the Earth’s green Cape and verdant Isles/ Hesperian sets

Chris? he repeated after her very softly, his eyes upon her, tenderly indulgent. Ah! let it be Christine. I may call you that? My actual name is Christina, but that's a detail. You can call me Christine if you like it best.