The Continuum roleplaying game has been in existence for about five years now officially, and there are many elements of the game system that have aspects to them that make the players, and GMs, think a little bit. This Frequently Asked Question (FAQ) page is designed to answer some of the commonly asked questions about one of the more interesting Continuum game elements - Skills.
Also note that in Continuum every creature from an Inheritor down to an amoeba Blunders on a double "0". It keeps things interesting.
However, skills also have difficulty levels. One of the examples in Continuum , page 16, is useful here. Suppose the character wants to hack NORAD's mainframe computer. The book suggests that this is a job for Master level of skill. If the character had Master level of skill in Computers (Security/Hacking), he would roll normally. However, he doesn't - he's only Journeyman level. He's not as experienced as the character would need to be able to get in. Therefore, there's a penalty. Looking at the Action Difficulty Modifier Table on page 16, the character is a Journeyman trying to achieve something that really calls for a Master. The action's difficulty is one title higher than the character's skill, so there is a -1 penalty to his rating. Thus, although he has a J8, he would roll against a 7. It's harder for him to do it. If he succeeded and then told his computer-hacking buddy what he had done, he might try. However, though brilliant, this guy's a bit flaky: he's never tried hacking anything before, and thinks it'd be fun to try something impossible for a change. With a Mind of 8, his effective Computer (Security/Hacking) skill is "U"6. ("U" is in quotes because it's not really a skill he has. However, the effect is the same.)
This guy now tries NORAD. Master is effectively four titles above unskilled. Thus, the U6 acquires a new rating of 2. (It's still possible! Probably time for GM intervention as per the footnote to the table on page 16.) So yes, the modifiers are cumulative. But the first modifier isn't really a modifier as such... it's how the skill rating is arrived at in the first place. It will remain the same as long as the attribute and skill title remain the same.
Here's how I imagine it should work. Suppose a character and his friend decide to compete at archery. The character has Missile Weapon (Bow) (note that this skill is not on the skill list) A7, and his friend has Missile Weapon (Bow) J8. They're both aiming at a small target which requires a Journeyman level to hit, so the character's rating is modified to 6 and his friend's remains the same (8). Here are a couple of possible outcomes.
The character rolls a 9 and his friend rolls a 3: The character's result is -3 and his friend's is 5. He hits and the character misses. Thus, his friend wins, since the character didn't even hit the target. The character rolls a 2 and the friend rolls a 6. The character's result is 4 and his friend's is 2. Both the character and the friend hit, and the character wins because he had the higher result.
Note that the uncontested action part of this resolution used the Action Difficulty Modifier Table, while the competitive action part did not. Note also that if the character and his friend had decided to race hacking into NORAD (see the previous question's answer), that the character would win by superiority. And remember, winning by superiority only applies in contested actions. The GM should still require a roll, since the characters have to see if they break in at all.
Bear in mind that this interpretation is not in the rulebook, but I believe it is the best one.
Special thanks to Chris Adams, Dave Fooden, Barbara Manui, David Trimboli, and the folks on the Continuum Mailing List for their help in the compiling of this FAQ information.