Thursday, September 9, 2010

Good Argument

There are 3 different tests that an argument must pass in order to be considered a good argument according to the Epstein text. The first test is: The premises are plausible. This means that we must have a good reason to believe that the premise is true. The second test is: The premises are more plausible than the conclusion. The final test is: The argument is valid or strong. An argument is considered valid if there is no possible way for its premise to be true and its conclusion false at the same time according to the text. Arguments are strong if "there is some way, some possibility for its premise to be true and its conclusion to be false (at the same time), but every such possibility is extremely unlikely."
The argument I will test is: "John is a basketball player. All basketball players are tall. Therefore John is tall." The first premise of this argument is plausible because there is no reason to believe that John is not a basketball player. However, the second premise of this argument is false because, although most basketball players are tall, not all of them are. The conclusion of this argument is true. Because the second premise is false, this is a bad argument. The premises of the argument are are not more plausible than the conclusion because not all basketball players are tall. This argument is valid because there is no way that John can be a basketball player and not be tall according to the argument. All in all, this argument is a bad valid argument.

1 comment:

  1. Hey there Kenny,
    I really like your example. I do agree with your argument. I also do agree with your stance on each premises. I also would like to add on your second premises; doesn't your premises also depends at what height would one consider "tall" ? Wouldn't this also make this a reason for the premises to be false ?
    I do have a doubt with your stance on your argument. Since your premises are false, doesn't that make your argument invalid?
    I do remember reading that, even though your conclusion is true, if your premises are false, your argument is to considered as invalid.
    I could be wrong though. :)

    ReplyDelete