C4W3 - RNN output notation bug

In videos “Conceptual overview”, “Shape of the inputs to the RNN” Laurence calls output of RNN cells “Y”, even though the slides he’s talking through show a hat “^” above each Y.

Nowhere in that week’s materials (videos or ungraded labs) I found a word “hat” being used. Yet that week’s quiz asks that, and apparently the right answer includes Y-hat.

Terminology is not consistently used.