Defend open source t-shirt in emnist letters.

This T-shirt design features 'defend open source' written in EMNIST letters, a variant of MNIST, aka the dataset that taught Al to read your doctor's handwriting. MNIST was developed by Yann LeCun, Corinna Cortes, and Chris Burgess, and it became the go-to benchmark for training and testing deep learning models, one the big reasons AI works today. It’s a good example of how open-source and science bring out the best in humanity, especially in the long run. *Proceeds go to support open-source AI development.