Infact
74 / 100
Mostly True Global

Rats know how to laugh.

Infact verdict: Mostly True (74/100).

The claim that rats know how to laugh is supported by evidence showing that rats emit ultrasonic sounds when tickled, indicating pleasure and joy similar to laughter in humans. Multiple studies, including those cited from medium-reliability sources, suggest that these sounds are an indication of positive emotions. However, while the evidence suggests rats exhibit behaviors akin to laughter, the interpretation of these sounds as 'laughter' is more an anthropomorphic description rather than a technical one. Overall, there is a consensus that rats display positive emotional responses that can be likened to laughter.

June 09, 2026 Language: en 1 claim analyzed
How is this score determined? →

Individual claims

74
Mostly True Science
Rats know how to laugh.
Evidence shows that rats emit ultrasonic sounds when tickled, which researchers interpret as laughter due to the indication of pleasure and joy, akin to human laughter.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 80
Web Consensus Weight 50
Source Quality Score 70
Source Quality Weight 25
Llm Reasoning Score 80
Llm Reasoning Weight 25
Weighted Total 74
Evidence Summary No fact-check match; 3 web sources support.

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