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the claim

All mammals give birth to live young.

the verdict
REFUTED
the evidence says no
Recorded sources
0 sources for · 4 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that all mammals give birth to live young?

No. Reference books state that almost all, not all, mammals give birth to live young, implying exceptions such as egg-laying monotremes. A review also notes live birth is not exclusive to mammals.

Verdict: REFUTED · 0 sources for, 4 against · Last checked

Evidence against · 4
Inside the Shark Nursery: The Evolution of Live Birth in Cartilaginous Fish
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Inside the Shark Nursery: The Evolution of Live Birth in Cartilaginous Fish. (n.d.). api.semanticscholar.org. https://api.semanticscholar.org/CorpusID:257558090

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More against · 3
The life cycle of mammals
2012
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Heinrichs, G. S. (2012). The life cycle of mammals. archive.org. https://archive.org/details/lifecycleofmamma0000gray_w7q6

Amazing mammals
2016
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author, H. L. M. (2016). Amazing mammals. archive.org. https://archive.org/details/amazingmammals0000herr

First order logic - all x is y and all y is z
Get citation
First order logic - all x is y and all y is z. (n.d.). math.stackexchange.com. https://math.stackexchange.com/questions/2647797

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