Confirmed by Chamberlain: negotiations bear risks.
We begin with a quote. Without intending to do so, it reveals more than its source might care to divulge. “Iran’s government blasted Dr. Shaheed’s report as not being objective”. (He is the UN’s Human Right Rapporteur in Iran.) An Iranian official said that Shaheed "has not paid sufficient notice to Iran's legal system and Islamic culture and he considers whatever he sees in the West as an international standard for the entire world."
Noteworthy subliminal warnings hide in this statement. The key components are “Iran’s legal system,” her “Islamic culture” and “the West as a standard for the world”. The phrasing reveals the perspective of Iran’s government and its quality as a treaty partner. This reflects on the nuclear weapons area where trust is, more than formal pacts, crucial. The assumed intent is in the nuclear realm more important than the treaty right to blame cheaters. Once a swindle is unmasked, the defrauded party has options. One is to sue before an international tribunal. The other is to deliver a preventive nuclear strike. The first reaction is useless. The second one is as effective as it is unpleasant.