Originally Posted by
Griffonbait
You are correct, there is no clearly direct statement other than an example, however, the example is clearly implying the use of FLOOR() in the DP spending process. As you have identified: Core Rulebook ICE#5800, p. 22, Apprenticeship Skill Development chapter.
The example given has 61.2 DPs getting FLOOR()-ed to 61.
An example with 61.9 DPs to spend would have the exact same 61 DPs to spend, because the PC has only 61.9 points to spend, not 70. See explanation:
If two PCs have 61.2 & 61.9 DPs, and spends these DPs as normal, then they can only spend in integer lots, with the smallest amount spendable to be 1 DP. In both cases, neither PC can spend their remaining 0.2 or 0.9 because it is not 1 whole DP.
Hence by the very definition of spending DPs, the FLOOR() value must be the amount available to spend - rounding a DP value to the nearest whole number can result in the PC having spent MORE DPs than they actually have.
Sorry to be a pain here, but as a mathematician, I can clearly see the solution, FLOOR(), being used.
A willing GM may allow for the PCs to save up their fractions of DPs over time, so that they can later spend any whole numbered amount, but that is more work for GM and players.