Stupid noob Questions: Part MMCCIX

[Me Loonn]

Does Counter Intel defend agains any and all attacks as long as points are left in the currently running project(s) ?
When using lvl 3 counter intel, does mean it can only defend agains only lvl 1, 2, and 3 intel attacks ?
Puppet Political Parties needs applied intel lvl 4 and works agains AI every time (well ok, 50% of the time or so), but it never gets defeated(?). Can PPP even be defended agains ?

I just started a new game with TDM but none has PPP yet, so i cant check these either ..