An expert is a man who has made all the mistakes which can be made, in a narrow field.

– Niels Bohr

Quite interestingly graduate studies usually take about 5 years total in order to obtain a PhD. It can sometimes be one year less or one or a few years over (too long is usually not seen as a good sign however). Assuming that this is basically your full time occupation, have you notice that at the end of this time frame, you will have reached about 10000 hours of dedicate training in your field.

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