I once ago presented the plan for Lili  to the CTO of a very famous digital assistant start-up. He laughted and said “not doable”.

Yet, we did it! Here is another example in robotics!

The secret? When the pain is so incrusted in you, no matter how complex it may be; you just do it!

No problem is impossible to solve; “do you really want to achieve it?” and “what price will you agree to pay for it?” is the two questions that really matter! This guy wanted to climb again; and went back to the engineering class to design his own legs!