Tehachapi's Online Community News & Entertainment Guide
Tehachapi's Online Community News & Entertainment Guide
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I have recently been involved in trying to help some people move. Since they are going to a smaller place they have to get rid of stuff. A lot of stuff. And even when something isn’t an heirloom it can still be a memory; and a memory can be important. I have stuff that I am unlikely to ever need to use again, such as my freshman college physics book. I’m unlikely to ever need that again, since I could look up anything in it on the Internet, and find it faster. However I have memories attached to that battered old book, like how I got rid of...
Wandering around on the Internet can lead to some strange discoveries. Here’s a case in point. There is a specific definition of common knowledge used in logic. We generally think we know what common knowledge must be. It’s just the stuff that everybody knows. But that’s not what it actually is. The stuff that everybody knows is “mutual knowledge”. We all share in that piece of knowledge. What makes it common knowledge is when we know that everybody else knows it. To illustrate this, think about the story of the Emperor’s New Clothes. In...
