Jed says he thinks it it impossible to measure the performance of a black box by measuring the input and output, without knowing how the heat is dissipated from the output. That is clearly not true.
Jed. I did not say it is impossible. Please do not put words in my mouth. AA. You said it was not possible to know if the 1 MW plant produced 1 MW without knowing where the output went This is just a variant of what I quoted you as saying.

