Quote Originally Posted by Sarmatian View Post
1) You're again ignoring numerous testimonies that mention strong odor and yellow brownish cloud. Sarin is odorless and colorless.

2) The sarin found in Syria has been that produced by the government, a higher grade. Sarin used in 2013 (and possibly now together with chlorine) has been low grade, low quality.

3) doctors didn't say sarin specifically, they said some of the symptoms were consistent with a nerve agent "like sarin".

4) OPCW released a following statement after the attack: the OPCW is investigating the incident in southern Idlib under the on-going mandate of the Fact-Finding Mission (FFM), which is “to establish facts surrounding allegations of the use of toxic chemicals, reportedly chlorine, for hostile purposes in the Syrian Arab Republic”.

So, please come again about physics...
The brown cloud only suggests another related G-series nerve agent, Soman, but it doesn't make any difference for our purposes, because it is also a binary weapon and can't be released accidentally by bombing. That's the problem: not that the rebels might not have chemical weapons but that they couldn't have chemical weapons stored in a way that would allow them to be released according to the Russian version of events.