Al Gore says he invented the internet. Now, we all know Al Gore is an extremely trustworthy (cough, cough) person. Would he lie to you?
The internet was not invented by a single person. Tim Berners-Lee created HTTP and invented HTML, DARPA (now ARPA) came up with the idea to link computers remotely and use a system-independent communications protocol (which became TCP/IP). Others again invented SMTP, POP, IRC, NNTP, and all the other protocols and standards.
Al Gore might even have been part of one of the organisations (probably as the janitor) involved.