question on intel

[Dogboy]

Thanks, CK. May I pester you to tell me how defensive intel works?

If I spend x% of my points on a project, does the remaining 100-x% that goes to defensive intel accumulate each turn, or does it just counter whatever threats are present this turn? Does it simply subtract from the # of points spent by my enemy? Or, does it build up and each time he completes a project, its cost is subtracted from my defense?

If I get a message "your intel project has been destroyed", does this mean the target outspent my expenditure by spending more on defensive intel?