41. This level of abstraction means that database vendors can be switched without it affecting the developer's code. 42. "When we are arguing at the level of abstraction , he wins because he's popular, " he said. 43. His foundational work on algebraic geometry is at a higher level of abstraction than all prior versions. 44. Increasing the level of abstraction still further, simulation moves towards an environment readily recognised by civilian wargamers. 45. Fifth, when formulating pressumptions it is challenging t > discern and determine the level of abstraction . 46. Similar to many concepts in computer science, the term can be used at different levels of abstraction . 47. PM also used DCs but there was an added level of abstraction called Presentation Space ( PS ). 48. For Lakoff, the greater the level of abstraction the more layers of metaphor are required to express it. 49. URBI provides a higher level of abstraction by integrating parallelism and events in the core of the language semantics. 50. Reconciling her ritual restraint with the lesser levels of abstraction around her is a problem the production never solves.