What if I choose not to hear it?

Do you know the old philosophical question "If a tree falls in the forest and no one hears it, would it create a sound?"  

One explanation is: sound is different frequencies of vibrations, and if no one is in the forest to hear it, those vibrations will not be converted into sound. So by that definition, there would be no sound.

So what about everything else? If something happens and you don't think it's a problem, but your mum does, is it a problem? 

Unless you like problems, next time this happens ask yourself "What if I choose not to hear it?​"  

​Then smile and say or think "Interesting point of view, mum."