How do I know in what order are the Keras classes? I mean, how do I know class 1 is associated with dogs, and class 2 with cats?
With only 2 classes, in the lecture I think Jeremy just made a hand-wave, as it's pretty easy to tell which class is which, just by showing the test image (and assuming the classification got it right). But what if there are a lot more than just 2 classes, say, 200 classes -- I'm not going to look at 200 images to determine which number is which class, right? Or what if as a human I can't tell which class is which from the image (e.g. in cancer detection, lacking expertise I'd not be able to tell which class it is just by looking at an image.)