Can we talk about A J Ayer and Moritz Schlick on Verifiability/Falsifiability Principle? And on the questions surround "Meaning"?

Here is what I am quoting from Wiki Account on Moritz Schlick's assassination.

"With the rise of the Nazis in Germany and Austrofascism in Austria, many of the Vienna Circle's members left for the United States and the United Kingdom. Schlick, however, stayed on at the University of Vienna. When visited by Herbert Feigl in 1935, he expressed dismay at events in Germany. On June 22, 1936, Schlick was ascending the steps of the University for a class when he was confronted by a former student, Johann Nelböck, who killed Schlick with a pistol. The court declared Nelböck to be fully compos mentis, he confessed to the act, was detained without any resistance, but was unrepentant. The delinquent used the judicial proceedings as a chance to present himself and his ideology in the public. He claimed that Schlick's anti-metaphysical philosophy had "interfered with his moral restraint". In another version of the events, the murderer covered up all political causes and claimed that he was motivated by jealousy over his failed attachment to the female student Sylvia Borowicka, leading to a paranoid delusion about Schlick as his rival and persecutor. Nelböck was tried and sentenced, but the event became a distorted cause célèbre around which crystallized the growing nationalist and anti-Jewish sentiments in the city. (The fact that Schlick was not Jewish did not seem to matter to propagandists capitalizing on the crime.) After the annexation of Austria into Nazi Germany in 1938 the assassin was released on probation after serving two years of a 10-year sentence."

(Moritz Schlick's murderer is at the centre.) Schlick is the founder of Vienna School of Philosophy - the single most prominent group of intellectuals working in the fields of Science, Philosophy, and Mathematics. 

Other giants of Vienna Circle - 

(1) Rudolf Carnap
(2) Otto Neurath
(3) Friedrich Waismann