Stealing the mouse from Xerox PARC? Douglas Englebart might take umbrage with that statement -- he patented the mouse in 1967 though it took years for the patent to be granted. His 3 button, X-Y direction indicator for a display system looks pretty familiar to most computer users these days. Sadly his patent expired before mice became popular so he never made much money from it. The story is that the mouse moved from the Stanford Research Institute to Xerox PARC when Bill English who worked with Englebart moved from SRI to PARC.

As for the GUI, the sources I find state that Apple paid Xerox for the visits to Xerox PARC by allowing Xerox a pre-IPO purchase of Apple stock. If you check the development of the GUI, you will find quite a bit of academic work being done outside of PARC which was also used by Apple's staff as a source for ideas. A fair number of the Apple staff working on the GUI were ex-Xerox PARC employees. No reliable source has been able to show that any non-compete clauses were in effect. Xerox did attempt to sue Apple at one point but the case was dismissed.

Anyhow, I must thank you for the laughter your stupidity brought to my day. It's not everyday someone stuffs both feet in their mouth to the kneecaps.