I am not sure exactly how the talent tree prerequisites works. Do you need all talents in any path, or do you need all talents in one path (from the root).

For example, in the Ranged Talents.

If you want to learn Crippling Shot, do you need to learn both Hawk's Eye and Marksman, or will it suffice to learn one of them?

The text on page 97 is as follows:

"Then, the player must trace a direct line along the tree’s paths from the top-most talent down to the desired talent. If there are any intervening talents that the character does not possess, those must be purchased first."

Notice that paths are in plural, so it means all paths?

I think they're just using odd wording when they say "paths" as in, each line on the tree is a "path," so when tracing a line, it goes across multiple paths.

If I were GMing, off of what I saw in this book, I would not require having all connected paths. For example, the Social tree. While Into the Jaws of Hell is a useful talent, I wouldn't say its so useful as to have 6 talent pre-reqs over 3.