On Sat, Feb 27, 2016 at 6:01 AM, Timothy Collinson <xxxxxx@port.ac.uk> wrote:
In my head I had a pretty clear idea of the difficulties involved (not all of which were obvious to the PC).

In my opinion, it's perfectly fine to say something like, "I can't explain all the modifiers without providing metagame information. Do you prefer that type of game?" 

--
Richard Aiken

"Never insult anyone by accident."  Robert A. Heinlein
"I studied the Koran a great deal. I came away from that study with the conviction there have been few religions in the world as deadly to men as Muhammed." Alexis de Tocqueville (1843)
"We know a little about a lot of things; just enough to make us dangerous." Dean Winchester
"It has been my experience that a gun doesn't care who pulls its trigger." Newton Knight (as portrayed by Matthew McConaughey), to a scoffing Confederate tax collector facing the weapons held by Knight's young children and wife.