In similar fashion, Searle asserts that "institutional power – massive, pervasive, and typically invisible – permeates every nook and cranny of our social lives...the invisible structure of social reality". If one accepts the validity of the idea of social reality, scientifically, it must be amenable to measurement, something which has been explored particularly in relation to trust. "Trust is...part of a community's social capital, as Francis Fukuyama argues, and has deep historical and cultural roots". Theories of the measurement of trust in the sociological community are usually called theories of social capital, to emphasize the connection to economics, and the ability to measure outputs in the same feeling. One aspect of social reality is the principle of the "big lie", which states that an outrageous untruth is easier to convince people of than a less outrageous truth. Many examples from politics and theology (e.g., the claim that the Roman Emperor was in fact a "god") demonstrate that this principle was known by effective propagandists from the earliest times.