Which NaN, INF matters

  1. NaN, INF in the output -- NaN, INF is propagated through the codes, need a tool to help detect how these NaN, INF
  2. NaN, INF are not in the outputs:
    1. Eliminating them in a proper way
      1. Throw them (automatic mixed precision)
      2. max not propagate them
      3. In matrix operations
    2. Incorrectly not propagate them