According to Terriff, Positivism shows four connected characteristics in social sciences. First, “there is an objective truth that can be discovered.” Second, “the means of discovering that truth is reason and there is only one correct form of reasoning”. Third, “the tool of reasoning is empiricism, which enables the analyst to test propositions”. Fourth, “there can be a distinction between observer and observed”. The post-positivists argue that there is no distinction between observer and observed.