Is a hole a thing? It’s nothing, an empty space, but then why give it a name? A hole in a bucket or donut or sock or road - part of the bucket/donut/sock/road, or its own thing? Is the inside edge of a donut part of the donut, or the hole? This stuff actually has serious implications. Another example would be ‘personal space’, it’s just empty space, but it’s ‘personal’?