What does a bear become when it cuts its nails?

"The bear cut his nails and became" capable ". Cutting the bear's nails into "energy" is a brain teaser, because the bear has four claws and there are four points under the word "bear". Removing the word "can" from the four points is the answer to a sharp turn. Brainstorming refers to thinking from other aspects when thinking encounters special obstacles. Refers to some intellectual questions that can't be answered with the usual ideas. "