Is acquiring software from an external source a good practice to install or run on a test machine that is isolated with any internal network?

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too vague, too open-ended... – studiohack Apr 15 '11 at 3:33
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Always write your own software on your laptop. Never use an external source. – ta.speot.is Apr 15 '11 at 3:34
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closed as not a real question by studiohack Apr 15 '11 at 3:33

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