This is a loaded question.
Mainly due to the issue that we have more information than ever before.
However we are indeed dumber because the actual pursuit of knowledge makes you have more experience and in general could be healthier.
Learning skills from trial and error, studying to try and understand. All of these things can help creativity and logic skills.
Googling something gives you the answer, but through no experience or learning.
Effectively we are like the bratty 10 year old who is held back a grade. We know all the answers, because we were given them.
Opposed to the 9 year old who studied to move ahead to get into the next grade.