i would tell younger people a is to put yourself in the position that what you'e tring to create already exists, and then you explaining works exactly. And generally, when i talk about things we're trying to invent, i would use the present tense as if it already exists. We just have to cotut i do all the steps in order to make it act actual. How Do You Think? will be broadcast on Channel 4 at 8pm tomorrow night (UK time) Follow us on Twitter @BBCNewsOnline and @cnnireport.