I have an issue wrapping my head around this: "We say that the stronger an argument is, the fewer and more reasonable its assumptions are. The corollary is that the weaker an argument is, the more and less reasonable its assumptions are."

In this statement, does that mean that a stronger argument has A FEWER NUMBER of stronger claims? Thus, meaning that a weaker argument has a MORE NUMEROUS amount of assumptions, but those are less reasonable? Am I getting that right?

The strength of an argument is directly related to the room for doubt left by the premise(s).

In other words, the more room for doubt there is after reading the premise(s), the less strong the argument is. And vice versa.