* they start at 0. tag! skills start at 20.
* they do not have a % symbol behind them, as it makes no goddamned sense.
* the cost on a per-rank basis is 1 for ranks 1-50, 2 for 51-100, 3 for 101-150, and 4 for 151-200 (maxxxx). each rank bought for a tag! skill is doubled.
* each skill has a bonus applied to all rolls that is equal to three ability score values (AG*3 or CH*2 + IN or ST + AG + PE, etc.)
* perks that require skill values only look at the rank, not the rank + bonus. e.g.: you want to take Advanced Research; the prerequisites are IN 8, PE 6, science 175. if the character's science only has 168 ranks, but it's effectively 182 because of his high IN and PE, he won't qualify.