Changing:
- the active agent and the nature of knowledge (epistemology):
- "something is true" vs. "I know something is true" vs. "something is provable",
- the nature of truth:
- necessary truth vs. possible truth vs. contingent truth,
- the type and goal of the activity:
- calculating vs. proving vs. exploring vs. guessing / heuristics,
- and the accuracy:
- deterministic vs probabilistic / stochastic,
- exact vs approximate.