Eye witness statements on yellow smoke which is the tell tale sign of chlorine gas.
As for it confirmed to being Sarin, other than the obvious such as the symptoms, the tox reports from the victims and the fact that there are no credible reports of Chlorine being used (gases can be given colorants, as well)...
Where are all the dead first responders using inadequate safety equipment for the supposed type of attack which kills people within 10mins, as a person’s clothing can release sarin for about 30 minutes after it has come in contact with sarin gas, which can lead to exposure of other people.
Manoka talking rubbish again like normal, say it isn't true?
>>>It was confirmed that Sarin was used based on chemical reports, from the ground. As sarin leaves behind a unique signature that cannot be found in nature or that comes from virtually any other chemical, it's more or less the only option that Sarin was used. Other than the obvious, it was obvious.
Below is taken from his own links:
"UK scientists have analysed samples taken from Khan Sheikhoun. These have tested positive for the nerve agent sarin, or a sarin-like substance," the delegation said during a special session on Syria at the OPCW in The Hague.
How's its obvious Sarin was used when the tests weren't conclusive by their own words?
A similar example to their conclusion is: this is chocolate or a chocolate like substance, so what is it chocolate or not?
First of all, many first responders did die at the attack, many of them immediately, and many more fell ill after treating the victims later on. They made up a large bulk of the casualties, in fact. 
Second of all, Sarin can give off of a yellow color as well, given the stabilizer which is often used to make it last longer since it degrades rapidly, and it's not too hard to add coloring to any sort of gas.
Third of all, Chlorine and Sarin provide a signature that is nothing alike. Chlorine is literally the element Chlorine, which means you find chlorine at the sight, and Sarin leaves behind phosphates which are a byproduct of it breaking down. As for it being a "sarin-like" substance, it would literally have to be a type of Sarin, given that Sarin is the only chemical that leaves the residue behind. There is nothing else in nature or manufacturing that leaves behind the same signature, so if it's not Sarin, it's identical to it in every way. Saying "sarin-like substance" is just covering their bases given you can never 100% confirm anything, but that it's most likely the case.
To debate the use of words that are just perfunctory and use that as your argument is asinine. Just like how when they say "we can never be sure, but..." after the theories in gravity or other things, that's the case here. Toxicology of the victims also showed the signature of sarin.
Fourthly, it's one huge coincidence to think that the terrorists would have just so happened to set off a chlorine bomb, mid-air, at the exact spot, at the precise time a bomb was dropped by the Syrian air force. One hell of a coincidence, don't you think?
Edited by Manoka, 14 April 2017 - 01:19 PM.