I missed the point? You said that "the government has decreed [jailbreaking] perfectly legal and valid." I just corrected you. You were wrong.
Apparently you take exception to the words "legal" and "valid". You apparently think that the exception granted to jailbreak phones in order to install legally obtained software is NOT legal or valid? This is clearly not true on the planet Earth in the United States of America as per:
Computer programs that enable wireless telephone handsets to execute software applications, where circumvention is accomplished for the sole purpose of enabling interoperability of such applications, when they have been lawfully obtained, with computer programs on the telephone handset.
Now perhaps you live in another country or on another planet where it is not legal or valid to jailbreak a phone in order to install legally obtained software, but I'm speaking about Earth and the USA here.
Just because the government does not consider jailbreaking to install legally obtained third-party apps a violation of the DMCA does not mean that it is perfectly legal and valid.
LOL. Just because the government says it's legal, that doesn't mean it really is legal!
Don't let logic keep you from ranting onward, though. Keep telling us how it's not legal even though it is. I'm sure I'll now get the usual 20 page lecture on how wrong I am. I'm sure you'll have fun for the next hour or two.
Exactly. Too bad. Apple is under no obligation to support jailbroken devices, even if they are jailbroken legally.
Apple is purposely purposely interfering with your right to view legally obtained books, which you have every right to view in order to obtain an unrelated goal of getting you to stop using software from "stores" or "users" whereby Apple does not receive 30% of the revenue for the sale or cannot control what appears on your screen (you might view pRoN after all on a sacred Apple device!). Given you have every right to jailbreak your phone in order to run such software (that they don't want you to run), they are purposely and maliciously trying to prevent you from doing something you are now legally entitled to do and using an unrelated store-bought item (tying of a sort again) to do it.
It would be like Microsoft disabling your copy of Microsoft Office until you removed Firefox from your system. Office has NOTHING to do with Firefox except that Microsoft has control over it and is using it as leverage to get what they want, which is for you to buy all your software from them when it conflicts with something similar they happen to sell. Microsoft never went that far in reality, but got in trouble for just trying to stack the deck a bit (pre-install Explorer and make deals with their resellers to no pre-install Netscape).
Apple does this kind of thing all the time with the iOS platform. They don't allow 'competing software' with one of their products. They do everything they can (and are going even further lately) to force sales where they get a 30% cut even when they don't deserve it. They are getting really morally reprehensible and unethical, IMO.
In short, there's a big difference between "supporting" and "destroying". Apple is purposely and maliciously breaking your ebooks to try and force your hand to restore your phone to unjailbroken condition. That is a far cry from just not "supporting". That is purposely attacking your phone and your property (the ebooks you have the legal right to read).
It's yet another case of tying something in one market to prop up, control or force action in another market. Just because a company controls a gas station and an anti-freeze company that doesn't give them the right to refuse to sell you gas just because you didn't buy their brand of anti-freeze!
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No. Jailbreaking now falls within an exception of the DMCA so it is not a violation of that law.
Jailbreaking is a violation of 17 USC 106(2) (the copyright law dealing with creation of derivative works). It may, however, be excepted from legal liability by 17 USC 107.
You're assuming a derivative work is created and therefore making an abstract assumption (see Microsoft, CPM and DOS and the whole concept of reverse engineering). 17 USC 107 pertains to possible fair use, which is a different matter.
In any case, the question is whether a company has the legal right to purposely break unrelated software in an effort to get you to comply with something you legally don't have to comply with (i.e. returning a jailbreak phone to factory order). Apple doesn't want to stop you from reading books (that you purchased from them no less). They want you to stop jailbreaking your phone so you can avoid their App store (so they get the sale). Can you even imagine if Microsoft broke Windows so it couldn't run Microsoft Office until you removed Firefox off your computer? THAT is what Apple is doing here. If that's not illegal, it darn well should be!