What makes an argument plausible?

Arguments come in many different forms. They can be either weak or strong, or true or false. Many arguments aren't strong because they don't have anything to back them. The example given in the book Critical Thinking about God writing the Bible is a perfect example. The person arguing didn't give any support causing the argument to come to an end with no clear conclusion. In order for an argument to be considered good it needs to pass one of these three tests; the premises are plausible, the premises are more plausible than the conclusion, and the argument is valid or strong.
An example of a valid argument is:
"My dad rides his bike to work everyday. His bike was at the house when I got home. My dad didn't go to work today." While this argument is plausible it is set up to be weak. The first premise may be true, but it is no more true than that third. This is what makes the argument weak. Although my dads bike was home it may be because he carpooled or took the bus. In order for this argument to pass the three tests it would need more supporting evidence. In addition to his bike being home I would need to include that his work backpack was by the door and there was food cooking in the kitchen. This makes the argument more plausible, but it can still be considered weak.
Arguments need to be clear and have supporting backup to make it strong and plausible. Without that the argument tells us nothing.