I agree that the thoughts we derive are uniquely our own. I disagree that you still own them once you convey them to others. The capability of owning information at all is its own debate entirely. So called 'intellectual property' is a misnomer. It is legally treated completely different from property. see
Copyright Law. I believe the phrase 'intellectual property' is being used for the same reasons that words like 'stealing' and 'piracy' are being used. They want you to believe that it is property when it really isn't.