Suppose I was born on March 17, 2010, which was a Wednesday. I was born on a Wednesday. My question is whether the fact that I was born on a Wednesday is a "conventional", "artificial" or "socially constructed" fact (I'm not sure about the right words to use, but I'm sure you got the idea). But I want you to make a distinction. It is obvious that we could have another word for Wednesdays. We could have called them "Sonntags", or "Fourthdays", or "Potatoes", or whatever. But the days would still be the same. As we could have called dogs "cats", and cats "dogs", but the animals would still be the same. In my view, the fact that I was born on a Wednesday is NOT a conventional or socially constructed fact, but rather a strictly objective, perhaps even "natural" or "logical" fact. Unfortunately I haven't found anybody who agrees with me until now.