1. 2 Management is a learnable but not directly teachable art.

2. We say C is Agnostically learnable in time t if its running time (including calls to the example

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4. A concept class C is Agnostically learnable if there exists an algorithm which takes as input δ,ε, and access to an example oracle EX(D), and outputs with probability at least 1−δ a hypothesis h : {−1,1}n → {−1,1} such that err(h) 6 opt+ε