Chalnoth
Senior Contributor
You're combining separate things that have nothing to do with one another.
In the case where you quoted, the paleontologists simply compared the bone mass of this particular tetrapod to the bone mass of other fish alive today, or in the fossil record. The difference was clear: this one had much stronger bones, which would have been utterly useless in the water, but very useful on land. I'd say the conclusion that this fish spent time on land would be very strong indeed just from looking at the strength of these bones.
In the case where you quoted, the paleontologists simply compared the bone mass of this particular tetrapod to the bone mass of other fish alive today, or in the fossil record. The difference was clear: this one had much stronger bones, which would have been utterly useless in the water, but very useful on land. I'd say the conclusion that this fish spent time on land would be very strong indeed just from looking at the strength of these bones.
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