The First Quarantine In History Began During The 'Black Death' Plague 30%

By John Amato29%

7/30/2026, 5:34:19 PM

BS Summary: This article contains 10 faulty reasoning types, including Appeal to Authority, Hasty Generalization, and Ambiguity (Equivocation), with Unattributed Quote as the most egregious example at 35.2% saturation with 56 hits. Analysis detected 312 faulty-reasoning hits from 159 analyzed words, generating a BS Score of 39.6% and a BS Rank of 30% (15,588 of 22,231 articles). This article is better (less manipulative) than 70.10% of the article peer group.

The Black Death's first blow started in 1348 in Ragusa, we now call Dubrovnik, spreading to all of Europe. 
Britannica: 
On this day in 1377, the lawmakers there instituted the first quarantine in the world.Anyone arriving from a plague-stricken place would be stopped at the gate and made to sit 30 days (later extended to 40) in isolation, either on the nearby uninhabited island of Mrkan or in the town of Cavtat, before stepping inside. 
Ships likewise were made to anchor off the coast to be sure the crew and their goods were not infected. 
Residents were barred from visiting them. 
The order was copied into the city’s lawbook, the Liber Viridis, or “Green Book,” which still survives in Dubrovnik’s archives. 
The word still survives too: quarantine from quaranta, Italian for 40. 
I try to find different things to post in our late night open thread. 
Open thread. 
Confirmation Bias
0%
Anchoring Bias
11.9%
Availability Heuristic
6.9%
Representativeness Heuristic
6.9%
Hindsight Bias
0%
Overconfidence Bias
0%
Framing Effect
0%
Loss Aversion
0%
Status Quo Bias
12.6%
Sunk Cost Effect
0%
Optimism Bias
0%
Pessimism Bias
0%
Negativity Bias
0%
Self-Serving Bias
0%
Fundamental Attribution Error
0%
Actor-Observer Bias
0%
In-Group Bias
0%
Out-Group Homogeneity Bias
0%
Halo Effect
0%
Horn Effect
0%
Dunning-Kruger Effect
0%
Recency Bias
0%
Primacy Effect
0%
Blind-Spot Bias
0%
Ad Hominem
0%
Straw Man
0%
Appeal to Authority
34.6%
False Dilemma
0%
Slippery Slope
0%
Circular Reasoning
0%
Hasty Generalization
34.6%
Red Herring
0%
Bandwagon
0%
Appeal to Emotion
0%
Begging the Question
0%
Post Hoc (False Cause)
11.9%
Tu Quoque
0%
Burden of Proof
0%
Appeal to Nature
0%
Composition/Division
0%
Anecdotal
0%
No True Scotsman
0%
Ambiguity (Equivocation)
34.6%
Gambler’s Fallacy
0%
Middle Ground
0%
Personal Incredulity
0%
Special Pleading
0%
Genetic Fallacy
6.9%
Unattributed Quote
35.2%
Quote-first Misdirection
0%
Biased Writer Voice
0%
Indoctrination
0%
Politically Left Leaning Bias
0%
Politically Right Leaning Bias
0%
Attempt to Sell a Product or Service
0%

159 words analyzed.

Analysis

Hover over highlighted words in the article to view the associated bias or fallacy analysis.