Doorman fallacy: Difference between revisions
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The [[Doorman fallacy]], also known as the "security guard fallacy" or "access control fallacy," is a logical error that occurs when someone assumes that the presence of a gatekeeper, barrier, or procedural safeguard alone is sufficient to prevent a problem, without addressing the underlying causes or vulnerabilities that the safeguard is meant to mitigate. This fallacy is often observed in discussions about security, policy-making, and risk management, where overreliance on superficial measures can lead to a false sense of safety or control. |
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{{Draft}} |
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{{H2|Definition and Core Concept}} |
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The [[Doorman fallacy]] arises from the mistaken belief that a single layer of protection—such as a physical barrier, a bureaucratic process, or a technological safeguard—is adequate to prevent harm, without considering the possibility of bypassing, circumventing, or undermining that layer. It is named after the metaphor of a doorman at a building entrance, who may be assumed to prevent unauthorized entry, but who cannot stop someone from entering through a window, climbing over a fence, or exploiting a loophole in the access control system. |
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This fallacy is closely related to other logical fallacies, such as the "security through obscurity" fallacy, which assumes that hiding information or systems will inherently protect them, and the "false dilemma" fallacy, which presents only two options as if they are the only possibilities. However, the [[Doorman fallacy]] specifically focuses on the overemphasis on surface-level defenses while neglecting deeper systemic issues. |
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{{H2|Examples and Applications}} |
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The [[Doorman fallacy]] can be observed in various contexts: |
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1. **Security Systems**: A company may install surveillance cameras and require employee badges, assuming these measures alone will prevent theft. However, this ignores the possibility of insider threats, social engineering, or physical breaches that bypass the cameras and badges. |
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2. **Policy-Making**: A government might implement strict border controls to prevent illegal immigration, without addressing the root causes of migration, such as economic inequality or political instability. |
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3. **Technology**: Software developers may rely solely on password protection for user accounts, failing to account for vulnerabilities like phishing attacks or brute-force hacking. |
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In each case, the assumption is that a single safeguard is sufficient, even though it may be easily circumvented or ineffective against more sophisticated threats. |
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{{H2|Criticism and Implications}} |
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Critics of the [[Doorman fallacy]] argue that it can lead to complacency, resource misallocation, and a failure to address systemic risks. For example, focusing exclusively on visible security measures may divert attention from less obvious vulnerabilities, such as human error, outdated infrastructure, or social engineering tactics. This fallacy is particularly problematic in fields like cybersecurity, where layered defense strategies (often referred to as "defense in depth") are considered essential. |
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{{H2|Related Concepts}} |
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The [[Doorman fallacy]] is often conflated with the "security through obscurity" fallacy, but the two are distinct. While the [[Doorman fallacy]] focuses on the inadequacy of single-layer defenses, "security through obscurity" assumes that hiding information or systems will protect them, even if they are inherently insecure. Another related concept is the "illusion of control," a cognitive bias where individuals overestimate their ability to influence outcomes, often by relying on superficial safeguards. |
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{{H2|References}} |
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- [Wikipedia: Fallacy](https://en.wikipedia.org/wiki/Fallacy) – General overview of logical fallacies, including the [[Doorman fallacy]]. |
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- [Security Through Obscurity](https://en.wikipedia.org/wiki/Security_through_obscurity) – Explanation of a related concept. |
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- [Defense in Depth](https://en.wikipedia.org/wiki/Defense_in_depth_(computing)) – A strategy that counters the [[Doorman fallacy]] by using multiple layers of security. |
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{{Fallacies}} |
{{Fallacies}} |
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{{Ollama}} |
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{{Pending Human Review}} |
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Latest revision as of 00:14, 4 November 2026
The Doorman fallacy, also known as the "security guard fallacy" or "access control fallacy," is a logical error that occurs when someone assumes that the presence of a gatekeeper, barrier, or procedural safeguard alone is sufficient to prevent a problem, without addressing the underlying causes or vulnerabilities that the safeguard is meant to mitigate. This fallacy is often observed in discussions about security, policy-making, and risk management, where overreliance on superficial measures can lead to a false sense of safety or control.
Definition and Core Concept
The Doorman fallacy arises from the mistaken belief that a single layer of protection—such as a physical barrier, a bureaucratic process, or a technological safeguard—is adequate to prevent harm, without considering the possibility of bypassing, circumventing, or undermining that layer. It is named after the metaphor of a doorman at a building entrance, who may be assumed to prevent unauthorized entry, but who cannot stop someone from entering through a window, climbing over a fence, or exploiting a loophole in the access control system.
This fallacy is closely related to other logical fallacies, such as the "security through obscurity" fallacy, which assumes that hiding information or systems will inherently protect them, and the "false dilemma" fallacy, which presents only two options as if they are the only possibilities. However, the Doorman fallacy specifically focuses on the overemphasis on surface-level defenses while neglecting deeper systemic issues.
Examples and Applications
The Doorman fallacy can be observed in various contexts:
1. **Security Systems**: A company may install surveillance cameras and require employee badges, assuming these measures alone will prevent theft. However, this ignores the possibility of insider threats, social engineering, or physical breaches that bypass the cameras and badges. 2. **Policy-Making**: A government might implement strict border controls to prevent illegal immigration, without addressing the root causes of migration, such as economic inequality or political instability. 3. **Technology**: Software developers may rely solely on password protection for user accounts, failing to account for vulnerabilities like phishing attacks or brute-force hacking.
In each case, the assumption is that a single safeguard is sufficient, even though it may be easily circumvented or ineffective against more sophisticated threats.
Criticism and Implications
Critics of the Doorman fallacy argue that it can lead to complacency, resource misallocation, and a failure to address systemic risks. For example, focusing exclusively on visible security measures may divert attention from less obvious vulnerabilities, such as human error, outdated infrastructure, or social engineering tactics. This fallacy is particularly problematic in fields like cybersecurity, where layered defense strategies (often referred to as "defense in depth") are considered essential.
Related Concepts
The Doorman fallacy is often conflated with the "security through obscurity" fallacy, but the two are distinct. While the Doorman fallacy focuses on the inadequacy of single-layer defenses, "security through obscurity" assumes that hiding information or systems will protect them, even if they are inherently insecure. Another related concept is the "illusion of control," a cognitive bias where individuals overestimate their ability to influence outcomes, often by relying on superficial safeguards.
References
- [Wikipedia: Fallacy](https://en.wikipedia.org/wiki/Fallacy) – General overview of logical fallacies, including the Doorman fallacy. - [Security Through Obscurity](https://en.wikipedia.org/wiki/Security_through_obscurity) – Explanation of a related concept. - [Defense in Depth](https://en.wikipedia.org/wiki/Defense_in_depth_(computing)) – A strategy that counters the Doorman fallacy by using multiple layers of security.
This page contains information generated by Ollama. The information was reviewed, and may have been altered, by a human editor before being added to the Featured category. As of July 2026 information generated by AI is not subject to copyright and is thus in the public domain. This page is pending human review.