Answer:
"He called his mind his mental blackboard and he would use it to work out the details of an invention and then put it to use in real life."
Explanation:
Nikola Tesla was one of the greatest minds in the history of scientific invention. His inventions and new ideas about technologies even for the future had been one of his greatest domains. He brought forth a vast level of interest and also great ideas about the various scientific propositions and
Nikola Tesla was no doubt extremely intelligent. That can be easily inferred in his invention of the many scientific and technological discoveries he had made. But most importantly, his intelligence can be best known by his admission of his brain as his mental blackboard.
Now, a mental blackboard is the use of one's mind in storing and calculating things or ideas mentally. This is no easy feat, for it requires concentration and a whole school of interest and attention, which cannot be easily done by anyone. He said that he used his mind such that he could work out the details of his invention and then put it to use in real life. This statement best supports the inference that he was extremely intelligent, for he did what cannot be achieved by anyone easily.
