I fully agree with the given statement on the following grounds. 

Postmodernism describes truth merely as what there is mass consensus of people over, thus asserting that it neither needs to be empirically proved nor theoretically because it is only a by-product of social change. However, mass consensus can take time to embed in the society because it widely challenges existing beliefs, ideas, dogmas, hierarchical structures and a prevalent way of living. On the other hand by the consensus theory, if a certain subset of society accepts something as truth, that would suffice.

The idea is that truth can be ascribed as truth with relation to a particular society and time. Something that is true in one age might not be equally true in the other. Similarly it varies across cultures, where behaviors become outlandish and out of question in one society and totally acceptable in the other. Absolute truths like 2+2=4 are universal in any case so accepting them comes readily to people. It is the variation in pre-existent and new religious, scientific and political ideas largely that cause man to jump back and thus take time in acclimatizing to what would be the truth.

The reasons for this slow trickle down effect lie in man’s own insecurities, prejudices and weaknesses.

By the correspondence theory, ‘Truth is the conformity of the intellect with things’. Thus for the knowledgeable accepting the changing theories or ideas is not so hard while for others time and tide affect the decision. Change in itself is a catalyst for human existence and behaviour because it suggests overcoming personal biases and adjusting to the new ideas. Personal beliefs determine what is true.

Some of the universal truths of today have indeed been hard to accept for the wise of those ages. The momentum to take them in bore hard on those who presented it. To start with the Greeks, the Sophists who were the ultra democrats of that time, got persecuted because they questioned the wisdom of the gods thus posing a threat to the Greek states. As stated in Wikipedia, 'even Socrates (viewed by many as a sophist master) verbally recognized the Greek theogony (to avoid being killed).’

Truth has to be withstood by higher authorities like the Church, the state and the bodies in which the society places trust for its high intellectual level, like its political leaders, philosophers and intellectuals. For a long time whatever Alan Greenspan told American public was accepted as the ultimate truth about economy.

Religious leaders and prophets like Jesus Christ, Mohammed, and Moses faced equally strong opposition to their revelations and commandments. It was only when people sought a personal benefit in acceptance of the religion that the religions started spreading. For example, in the subcontinent a vast majority of the lower caste reverted to Islam as a reaction to the Hindu caste system which made some people Brahmins and others untouchables, thus denying all privileges to the latter and casting them in the role of a lower and servile being. Man’s inherent reservations to change can only be succumbed by his own interests in personal growth and betterment.

Similarly we have the example of Galileo whose now widely accepted theory of heliocentrism was rejected by the church because it went against the scripture. It is examples like these which tell us that the people can readily accept truths only if they find affirmation with the bodies of their belief because man suffers from an insatiable need to be accepted by those around him.

Women’s suffrage, the civil rights movement, labor unions rights etc were accepted after much resistance because they suggested sharing of privileges and rights which were hitherto exclusive to some.

Truths suggest social changes. Acceptance of it to some comes readily while others oppose it as it comes in conflict with their personal interests and engender their sense of well-being. There can only be a gradual or trickle down affect of important truths as man in his varied intellectual capacity and his survival instinct will always resist change.