"When you â€œbuyâ€ a
proprietary software you are not actually buying the software but a
license to use it. Although in many cases the physical package of
the software convinces you that you actually bought something that
belongs to you, in reality what you get is
someoneâ€™s permission to use a piece of
software. This does not explain why they will not give you the
source code of the program, so you or someone else can verify what
it does or doesnâ€™t. For sure, a buyer would
complain if a feature was missing from a software, but what about
something extra, something that is not in the list of features,
something that the program is not supposed to be doing or you
donâ€™t want it to do. It is certain that you
have no way of knowing what that thing you
didnâ€™t buy really does."
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