The Post-Truth Problem


“A crowd is only as smart as any given individual if that individual crafts the beliefs of the crowd”

Our morals and ideologies are the building blocks for shared identities. They are uniquely human concepts that have driven progress towards common goals. Today, they feel far from it. But partisan conflict and identity politics are not new, nor are they inherently irrational. So, what is it about today’s moral climate that seems so explosive? In our hyper-connected, digitalized world, a Victorian-era essay provides surprisingly relevant guidance.

William Clifford (1877) opens his inquiry, The Ethics of Belief, with an image of a shipowner about to send his emigrant-ship to sea. Prior to raising anchor, the shipowner inspects the vessel’s aging construction and makes note of possible repairs, nonchalantly casting doubts on the seaworthiness of the ship and suggesting a thorough refurbishment could be in order. Then again, the shipowner deliberates to himself, the ship has weathered many journeys and overhauling it would mean delaying the many hopeful families due to board; not to mention the significant financial cost of repairs. After mulling over his inconvenient thoughts and arriving at a sincere conclusion that the vessel would carry the families unfailingly, the shipowner sends the emigrant-ship on its way with peace-of-mind. The ship then goes on to sink, taking its passengers and their hopes down with it.

Clifford explains that, unquestionably, the shipowner is to blame for the deaths of the emigrant families. Despite the sincerity of his belief in the ship’s sturdiness, he must be held accountable. More contentiously, Clifford also suggests that the shipowner should have faced sentencing regardless of the ultimate fate of the journey, because “he had no right to believe on such evidence as was before him” (Clifford, 1877, p. 1). This moral obligation to hold only those beliefs for which you have ample evidence is known as epistemic responsibility.

Fast-forward to the present day, it is implied that our society is devoid of epistemic responsibility, and that the degradation of social capital — shared ideals of goodwill, trust, and civic engagement — is the result of irrational beliefs and alternative epistemologies being acted out (Lewandowsky, Ecker, & Cook, 2017). In our post-truth age, we are all Clifford’s shipowner, interpreting the evidence before our eyes as it best suits us.

Motivated Reasoning

To rebuild epistemic responsibility in the post-truth age, where conventional norms of consistency, coherence, and fact-seeking have been abandoned, we must first consider how our individual rationality and collective cognition brought us here. Within an individual mind there are a multitude of heuristics and biases that have evolved adaptatively, but in some circumstances, they do not match up with modern decision-making environments. While the study of heuristics and biases has seen a renewal in popularity through the introduction of behavioural economics, these cognitive miscues have long been empirically demonstrated (e.g. Macdougall, 1906).

Recently, much attention has been given to the examination of motivated reasoning: the tendency for an individual to unconsciously fit or distort his or her information processing to suit his or her beliefs, goals, or motives. Put simply, motivated reasoning suggests that an individual’s evaluation of the world conforms to what he or she already knows, ultimately driving towards particular, preordained conclusions (Kunda, 1990). Drawing from Kunda’s seminal conceptualization, extensions and remodelling of motivated reasoning for topical settings has led to the creation of the Politically Motivated Reasoning Paradigm, which proposes that information and evidence is processed by individuals on the basis of their social meaning — such as their connection to one’s social identity, group membership, or policy relevance — rather than their truth (Kahan, 2016). Naturally, this avenue of psychological research appeals to contemporary cultural critics as a succinct explanation of why climate change communication is failing, and why bipartisan cooperation feels like little more than a farfetched aspiration.

Despite the negative connotations that one might attach to this manner of self-deception, motivated reasoning, like many other biases, plays a valuable role in an information-flooded world. The ability to “believe what [we] want to believe because [we] want to believe it” (Kunda, 1990, p. 480) helps us to preserve our self-concepts and navigate around uncomfortable, dissonant cognitive states, in turn promoting happiness and positive mental health. Besides, there remains a debate as to whether or not the process of motivated reasoning can be considered a bias (i.e., a systematic rather than occasional deviation from accuracy) at all. As Kahan (2016) explains, “motivated reasoning, far from reflecting too little rationality, reflects too much” (p. 12), because for the average individual, one’s beliefs about a global issue are of little significance to inspiring any policy-level change. Yet, one’s beliefs about that same issue may be of vital importance to maintaining solid standing among peers who are vital to that individual’s emotional and material wellbeing (Kahan, 2016). For example, if the majority of an individual’s friends hold similar beliefs on a given issue such as gun control — as is often the case — one’s decision to change this belief, while unlikely to inspire organized reform, could very well alienate him from the group. As such, this individual might be making an economically perfect assessment of expected utility by allowing motivated reasoning to guide him through the gun control debate and safeguard the coherence of his position. Viewed this way, motivated reasoning appears to be a completely rational response for individuals in a world of risk and uncertainty, but its prioritization of identity protection over truth-seeking means it may very well foil any attempt at epistemic responsibility.

Connected & Incompetent

Still, narrowing in on a single adaptive cognitive process as the sole cause for ideological segregation is a vast oversimplification, and one that does little to inform potential solutions. To effectively diagnose the issues of polarization at hand, our view of cognition must look beyond the individual and examine the mediums of communication that disperse and legitimize information through our social networks.

The shift towards internet-based media as a news source is well-documented (Shearer, 2018). Major media firms no longer hold a monopoly on information as the advent of social media platforms allow for a direct link from content producers to consumers, and what’s more, from consumer to consumer. While this creation of a readily-accessible epistemic commons has an intuitive appeal, the hyper-connectivity and structure of the social networks through which information is exchanged may be contributing to the degradation of collective competence (Hahn, Hansen, & Olsson, 2018).

Conventional knowledge celebrates the wisdom of crowds: the idea that the collective, aggregated judgment of the many can outperform any expert individual. While this theory indeed holds some validity, it is a romanticized concept, a populist view of human problem-solving in which democratized intelligence infallibly converges on truth. In practice, however, it fails to address the nuances of social influence. That is, in real-world social networks, individual intelligence is subject to individuals’ interdependence. When we turn to one another for information, we delegate a degree of our cognitive autonomy and rely on the competence of others, for better or worse. Given that digital spaces of socialization and news media have grown intertwined, navigating online information truly independently of the influence of others seems an unrealistic task. In other words, a crowd is only as smart as any given individual if that individual crafts the beliefs of the crowd (Hahn, Sydow, & Merdes, 2018). And as new post-truth norms develop in our social networks, where the information we need to know is replaced with the information that we “like,” taking a laissez-faire approach to mediating networked influence may prove damning (Seifert, 2017).

Tragedy of the Epistemic Commons

As things stand, the epistemic interests of individuals are at odds with the interests of our social networks. Motivated reasoning serves cognitive comfort, offering identity protection but restricting critical thought. Our social networks provide dynamic, around-the-clock connectivity, circumnavigating traditional media filters but relying on individual integrity. Together, investigations of both individual and collective cognition along these avenues illustrate the post-truth problem as a tragedy of the epistemic commons, where acting for ourselves on our cognitive impulses is dissolving the possibility of an epistemically responsible, global social network.

Where do we go from here? Evidently, the case of Clifford’s shipowner warrants continued thought. In an era where every action and belief is engraved in data, “no real belief, however trifling and fragmentary it may seem, is ever truly insignificant” (Clifford, 1877, p. 3).

Clifford, W. K. (1877). The Ethics of Belief. Contemporary Review.
Hahn, U., Hansen, J. U., & Olsson, E. J. (2018). Truth tracking performance of social networks: how connectivity and clustering can make groups less competent. Synthese, 1–31.
Hahn, U., Sydow, M. Von, & Merdes, C. (2018). How Communication Can Make Voters Choose Less Well. Proceedings of the Annual Meeting of the Cognitive Science Society, (May).
Kahan, D. M. (2016). The politically motivated reasoning paradigm. Emerging Trends in Social & Behavioral Sciences, 1–15.
Kunda, Z. (1990). The Case for Motivated Reasoning. Psychological Bulletin, 108(3), 480–498.
Lewandowsky, S., Ecker, U. K. H., & Cook, J. (2017). Beyond Misinformation: Understanding and Coping with the “Post-Truth” Era. Journal of Applied Research in Memory and Cognition, 6(4), 353–369.
Macdougall, R. (1906). On secondary bias in objective judgments. Psychological Review, 13(2), 97–120.
Seifert, C. M. (2017). The Distributed Influence of Misinformation. Journal of Applied Research in Memory and Cognition, 6(4), 397–400.
Shearer, E. (2018). Social media outpaces print newspapers in the U.S. as a news source. Retrieved from

Jason Burton
About Jason Burton:

Jason is a PhD researcher at the Centre for Cognition, Computation & Modelling (CCCM) at Birkbeck, University of London. Before joining Birkbeck, he earned an MSc in Organisational Psychiatry & Psychology from King’s College London and held a research position at Copenhagen Business School’s Department of Digitalization. His research seeks to further our understandings of how cognitive processes intersect with the post-truth environment, ultimately revolving around the topic of human rationality. Outside of academia, Jason works with HATCH Analytics as a research psychologist to apply behavioural insights in the workplace.