Classical inference Deal simultaneously with multiple candidate models,one model for each possible value of 0. A "good"hypothesis testing or estimation procedure will be one that possesses certain desirable properties under every candidate model. i.e.for every possible value of 0.Classical inference  Deal simultaneously with multiple candidate models, one model for each possible value of 𝜃.  A ''good" hypothesis testing or estimation procedure will be one that possesses certain desirable properties under every candidate model.  i.e. for every possible value of 𝜃