Instruction: Does the hypothesis contradict the premise? Premise: My memory is rickety, but I am sure my first recording was labeled MUSKRAT RAMBLE, and I think, though I am less sure, that it was played by the late  Muggsy  Spanier, who was, to my mind, one of the greatest of jazz trumpeters. Hypothesis: Though my memory is rusty, I'm pretty sure that my first recording was Muskrat Ramble. 
My memory is rickety, but I am sure my first recording was labeled MUSKRAT RAMBLE, and I think, though I am less sure, that it was played by the late  Muggsy  Spanier, who was, to my mind, one of the greatest of jazz trumpeters.###Though my memory is rusty, I'm pretty sure that my first recording was Muskrat Ramble. 