Argument from Hearsay
An argument from hearsay relies on a report passed through someone who did not witness the event. Its strength depends on the original source, the accuracy of transmission, and the possibility of checking the account.
THE IDEA
Argument from Hearsay
A second-hand report can lose important details or acquire new ones as it passes between people. Before relying on it, ask who witnessed the event, what they actually reported, and how the account reached you. The problem is accepting an unverified chain as though it were direct, decisive evidence.
Example #1: The reported theft
Lolita reports that Morris told Julian that Diane saw Bill steal money. That gives a chain of reporting, including an alleged eyewitness. It does not establish whether Diane saw the theft or whether her account has been passed on accurately. Speaking to the original witness and checking other evidence would help assess the claim.
Example #2: The near-death account
Joe’s mother repeats his account of an experience during a coma and treats it as evidence of life after death. There are separate questions here: whether she reports his story accurately, what Joe experienced, and whether that experience establishes her conclusion. The story alone does not resolve those questions.
Second-hand information can still be useful. The degree of checking should reflect the source’s reliability and the consequences of error. If a trusted friend passes on news of a one-day sale, a 10 minute drive may be a reasonable way to check. An accusation of theft warrants much stronger support.
Hearsay also differs from the anecdotal fallacy: a first-hand anecdote may be accurately reported yet given too much weight in a broader argument.
When to use it
Distinguishing first-hand testimony from second-hand reporting when evaluating a disputed account.
In everyday gossip, people often spread rumors based on hearsay, which can damage reputations.
In news reporting, stories based on anonymous sources may be considered hearsay and require verification.
In business, decisions based on unverified second-hand information can lead to costly errors.
FROM THEORY TO EVERYDAY LIFE
In practice
Hearsay about Bill stealing money
Lolita: My friend Morris told Julian that Diane saw Bill steal the money from the register! He is so guilty!
The claim has passed through several people. Diane is presented as an eyewitness, but Lolita has not established what Diane saw or whether her account was transmitted accurately.
Near-death experience story
After a serious accident that put him in a coma for three months, Joe told a story of going to heaven, seeing loved ones, and meeting angels. Joe's mother uses his story as evidence of life after death.
Her report is second-hand. Even an accurate retelling leaves a further question: does Joe’s experience establish the conclusion she draws from it?
A MOMENT TO REFLECT
Put it to work.
How often do you rely on second-hand information in your daily decisions?
What steps can you take to verify hearsay claims before accepting them as true?
Can you think of a personal experience where hearsay led to a misunderstanding or false belief?
CONTINUE THE CONVERSATION
Source texts
- Logically Fallacious - The Ultimate Collection of Over 300 Logical Fallacies