"We are able to use sight and our previous knowledge to define a table as a solid. We take what we see for granted. This is because we donít want to or donít have the time to go through the process of defining it as a table; it is considered common knowledge that a table is solid. This is where our senses can let us down. I visited the Tate gallery in Liverpool to look at an exhibition by Xu Zhen entitled 884 Minus 1.86 which was part of an exhibition called "The Real Thing: Contemporary Art from China". The exhibition showed different places. For example, there was a model of a factory which at first sight I thought was made out of metal, but when I examined the information next to it, I found out that it was in fact made of polystyrene. My senses let me down. So when a scientist looks at a table, he examines its structure closely, he studies what itís made of and he will conclude by describing it in a scientific way, which if we relate it back to the topic would be that a table is mostly empty space for the reason that a table is made up of millions of atoms and atoms are 95% space, of course anyone with a basic science education would agree with this theory, but may want to explain why people may say it is a solid."