Step 1: Understanding the View on Mathematical Knowledge.
Hume, an empiricist philosopher, contended that knowledge originates from experience and is inherently probabilistic, not absolute. Unlike rationalists, Hume posited that: - Mathematical knowledge is grounded in probability, not absolute certainty, due to its reliance on human perceptions and inductive reasoning rather than direct empirical evidence.
Step 2: Conclusion. The correct answer is 2. Hume.
Final Answer: \[ \boxed{\text{The correct answer is 2. Hume.}} \]