Prove it before a court of law. Oh wait, you can't-except a few miles from Apple's HQ.
I didn't realize it was ethical in IT to never license anything either. Almost all manufacturers don't buy up things to limit competition, but rather license them. Without Samsung's designs, there would be no iPhone. Without an iPhone, there would still be touch screen phones, as countless designs have demonstrated, some before the iPhone was announced. Regardless of what you think about Apple (Only innovating company) or Samsung (clearly guilty of piracy to you), that's a fact. No one needs Apple to survive, but Apple needs everyone else. And that's why you see so much of a backlash against Apple on these suits. Its not that we hate Apple. Hell, I love Apple products. Its that there's this myth Apple's being innovative right now (how?), and drives innovation (how?), rather than just make and market good products. But we don't like Apple trying to buy up the competition driving up prices on some services, and suing what they can't control. Apple's behavior in the past few years has been very anti-competitive. Its as if they didn't learn the lesson of Microsoft and instead of licensing the software (which would put Apple in Microsoft's position combined with still releasing taylor made hardware, or Apple's current position), they've decided to go all in, wreck the consumer market and say they're the only ones who are allowed to make things. Doesn't work that way, and Apple deserves to lose these lawsuits on many levels. After all, why can't TI sue Apple over their calculators? Oh wait, they licensed their designs. Same with a lot of other things the iPhone uses. But what has Apple allowed Samsung to license at a reasonable price? Oh wait, nothing. And Apple's patents (that they fight over, anyway) are almost all geared towards appearance. None towards actual hardware design beyond fitting something into a specified shell it seems. There's a reason a lot of the industry didn't patent that stuff: They didn't think they were too valuable, nor did they see someone coming along and suing them over what's been practice in computers and IT since the Windows-Macintosh issue years ago.
And had Apple held onto its OS too long, Microsoft would've pulled the plug on Office, which would've moved everyone to MS Dos and put Apple in worse fiscal straights quicker. But the bitterness of Windows winning doesn't allow you to see that, does it.
Edit: Not office. Apps that would become office. I misspoke there.