Of Falling trees, witness accounts and noises, perspective reasoning?

But the expectant recipient is presumably unaware of the sender and the royal postal worker, so was it sent or not ?

If the falling or felling of the tree made no sound that was witnessed by anyone in proximity, it fell but its falling bore nor bearing on the world. ut

If a card was sent and royal mail intercepted it leaving the expectant recipient in a quandary as to whether the sender sent, thinking they were no longer well considered or in favour, or mattered not a jot to the world, then in the natural schema of things there is an underlying truth the tree and the senders sentiments as much as the recipients mattered not to the royal mail, for what end or benefit we can only speculate abo