An "acute awareness of our ignorance is the heart of scientific thinking," says Carlo Rovelli, a physicist and author of Reality is not what it seems: The journey to quantum gravity . Science never hesitates to say "I don't know" when it does not know. Science does not take leaps of faith. Science is ready to admit its own errors when it learns better and it is ever ready to correct its errors. Rovelli's book concludes with such thoughts. I understood only that concluding chapter. Hence this is not a book review. I bought the book seeing a few reviews which implied that a lay person could understand quantum mechanics by reading it. All the quantum mechanics I learnt from this book may be summarised in the following diagram from the book itself: The book is mostly an elaboration of the above evolution of understanding the reality. There are a lot of technical terms and even scientific formulas which remain beyond the grasp of anyone who lacks at least a sen
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