I'll try again. You buy a car. It's expensive, so you buy comprehensive and collision insurance along with the state-mandated 40/20 PIP. okay. You wreck the car. Dammit. You have a 500 dollar deductible and the car has about 1700 dollars worth of damage. So you ask for a 2200 dollar estimate from the body shop. See how that works? You see where I'm going with this. You wanted a liberal estimate. Or maybe you want to apply sunlotion liberally on your back if you burn easily. Or maybe you'd like a liberal amount of peanut butter on your bread (Bush likes JIF, by the way). Conversely, if you're trying to sell your plan to install cable TV and carpeting in the state pen (after all, it's probably boring and lonely in there sometimes) you go to the voters with an underestimate hoping that, once they say yes, you can hit 'em with the real bill later. Or if you want your wife (or mom or slut-of-the-month or whatever) to buy you something pretty, you give them a conservative estimate of the cost.
Liberal, in this case meaning free or out-of-control, was implied by the question and by the link. Any of you bother to look? Conservative, then, finds it definition by contrast. Quod erat demonstrandum.
OK, but that's not really idelogical terms, but fair enough. I was really making another point though...