I am sure all of you once attended a formal meeting or a scientific forum like seminar. After the key-note speaker present his/her paper, what question do you usually ask firstly before coming further to some other more essential questions ?
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I might ask for the application (e.g. its usefulness) firstly-to have a glimpse at the end of the tunnel and stimulate my interest in the details of the workings of the product or invention.
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