Emerikol
Adventurer
Maybe I'm wrong but let me try to translate @pemerton. Feel free to correct me @pemerton if I get it wrong. He loves his fancy terms.Still not sure what this means!
The rules as strictly written without any circumstantial adjudication by the GM. A tight control over GM interaction with the rules. Whereas D&D for example pretty much said the rules are optional and the DM is final authority in 1e.