No, Receiver. Not even slightly. A simple but quite unequivocal refusal of whatever the Bearer is proposing. No further explanation or negotiation is necessarily required, although in certain circumstances (say, when No has arrived in response to Let's be friends or Do you feel the same?) it is certainly churlish. Receivers can make such requests with Tell me more, Tell me the truth or perhaps Please, or appeal the Bearer’s decision with Please; if they accept the Bearer’s choice, Fair enough, Whatever or I understand all make this courteously explicit. Should they wish either to inform the Bearer of a perceived error, Big mistake or Unwise do so, whilst the explicitly hostile This means war! or Evil laugh can be as serious or teasing as Bearer and Receiver require.