Introduction to Machine Learning / Data Mining

Well, there is a little bit difference between machine learning and data mining although I don't see any difference between them. See the Stackexchange debate on the difference between machine learning and data mining. At the end, it is about training the machine to recognize the data, and the predict the future (or unknown variables) with the training. Please, feel free to challenge me if I am wrong. I have been in search for the better explanation.