Test for A Good Argument

In chapter 3 Epstein talks about the three test for a good argument. The three tests to determine whether the argument is good or not is.
 1. The premises are plausible. This means that the argument gives you a good reason to believe the premises are true.
2. The premises are more plausible than the conclusion. This means that if the premises are strong and true than the conclusion should more than likely be true.
3. The argument is valid or strong. This means if the premise are false or week then the argument is not valid or strong.
For Example: Its summer and the sun is out. When the sun is out its hot outside. Therefor its hot outside so the sun is out.
In this example the premise are plausible. The second premise could be false because the sun can be out and it not be hot outside. With both premises being true then the conclusion is true. But with the second premise also being able to be false then the conclusion can also be false. This is a good argument, but not very strong.