hewitt.md

"Logic Programming can be broadly defined as “using logic to infer computational steps from existing propositions” However, mathematical logic cannot always infer computational steps because computational systems make use of arbitration for determining which message is processed next by a recipient that is sent multiple messages concurrently. Since arrival orders are in general indeterminate, they cannot be inferred from prior information by mathematical logic alone." - Carl Hewitt

http://arxiv.org/pdf/0904.3036v25.pdf