Jobs: 'No way to be sure' iPhone minerals are conflict-free

The minerals have been dubbed "conflict minerals" in a nod to the conflict diamonds -- according to Wikipedia, those mined in a war zone and sold to finance an insurgency, invading army's war efforts, or a warlord's activity, usually in Africa.
Since Rhodes was in the market to purchase an iPhone, he fired off an email to Apple CEO Steve Jobs asking about the source of the minerals used in the iPhone:
Hi Steve,
I’d planned to buy a new iPhone tomorrow – my first upgrade since buying the very first version on the first day of its release – but I'm hesitant without knowing Apple’s position on sourcing the minerals in its products.
Are you currently making any effort to source conflict-free minerals? In particular, I'm concerned that Apple is getting tantalum, tungsten, tin, and gold from Eastern Congo through its suppliers.
Looking forward to your response, Derick
Jobs responded:
Yes. We require all of our suppliers to certify in writing that they use conflict few materials. But honestly there is no way for them to be sure. Until someone invents a way to chemically trace minerals from the source mine, it’s a very difficult problem.
Sent from my iPhone
Wired verified the authenticity of the email response and suggested that Jobs' use of "conflict few" was a typo for "conflict free" which they attributed to the email coming from his iPhone.
Tip: Wired, Photo: Mark Craemer