version of a final version of this idea of doing puzzle tasks creating data creating tasks from raw readers wrote the very simplest version is rotation prediction this is really really so simple that it's amazing a works over but but there is also a concrete argument as to why it works the idea is you take an image you rotate it by a random angle so in this case you're rotating it by a multiple of 90 degrees and this C and you pass it through the convolutional neural net and the conversion here and that is asked to