So, I'm continuing to try to learn about these systems. I can see in the BRP Quickstart a resistance table on page 20.
Now, I'm going to compare that with what I see in the Age of Shadows pdf. Well, there is no resistance table. Age of Shadows has added skills they label as "resistances". However, it is not clear to me, for example, how to handle the lifting of the rock from the above quote. It seems like the rules are incomplete without the resistance table. I cannot find a reference to opposed characteristic rolls in Age of Shadows. (I believe that Renaissance is also missing the resistance table without explaining how to calculate if the hero can lift the boulder.)
Have I missed something?