If a packet gets “sucked down a black hole” (figuratively speaking) and is not received by its sender, and no message is sent back explaining the situation, then something is wrong. The failure to send a message means something is wrong with the . ICMP ISO TCP/IP HTTP

there is no universally accepted definition of art. although commonly used to describe something of beauty, or a skill which produces an aesthetic result, there is no clear line in principle between (say) a unique piece of handmade sculpture, and a mass-produced but visually attractive item. we might say that art requires thought - some kind of creative impulse - but this raises more questions: for example, how much thought is required? if someone flings paint at a canvas, hoping by this action to create a work of art, does the result automatically constitute art?