Como e' que e' possivel semelhante discrepancia?

Como e' que e' possivel haver semelhante discrepancia entre estes numeros sobre as mortes durante o protesto de Tiananmen? (da wikipedia)

(da wikipedia:)

• 10,000 dead (including civilians and soldiers) - Soviet Union.^[27]
• 7000 deaths - NATO intelligence.^[27]
• 4000 to 6000 civilians killed, but no one really knows - Edward Timperlake.^[28]
• 2600 had officially died by the morning of June 4 (later denied) - the Chinese Red Cross.^[22] An unnamed Chinese Red Cross official estimated that, in total, 5000 people were killed and 30,000 injured.^[29]
• According to a Time article, Amnesty International and some of the protest participants put the number of dead closer to 1,000.^[22] Other statements by Amnesty International have characterized the number of deaths as hundreds.^[30]
• In excess of 3700 killed, excluding disappearance or secret deaths and those denied medical treatment - PLA defector citing a document circulating among officers.^[28]
• 300 to 1,000 according to a Western diplomat that compiled estimates.^[4]
• 400 to 800 plausible according to the New York Times' Nicholas D. Kristof.^[4]
• A declassified NSA document indicated early casualty estimates of 180-500.^[31]
• According to the Chinese government, the official figure is 241 dead, including soldiers, and 7000 wounded.^[3]
• 186 named individuals confirmed dead as at the end of June 2006 - Professor Ding Zilin.^[32] But note that the cause of deaths of some of the individuals on Ding's list not are directly at the hands of the army. For example, at least one person had committed suicide after the June 4th incident (please see detailed list on article regarding Professor Ding).

E como e' possivel alguem ontem ter comentado que isto foi apenas uma prova que nao vale a pena protestar contra o governo? Que isto apenas mostrou que protestar nao compensa?

Penso que isto deve ser um exemplo de coragem e que todo o mundo deve ver o que e como aconteceu.