Sentence examples for but were both not from inspiring English sources

Substantial highland habitats in the Andes and terra firma rainforests in the adjacent margins of Western Amazonia may both have been necessary for faunal exchange to develop, but were both not present until ~7 Ma [ 17, 91].

The event itself is free; donations are not required, but are both much appreciated and tax-deductible.

Heart rate and stroke volume index were changed but were not statistically significant in both groups.

Improvements in MSFC score were observed in both trials but were not statistically significant [ 36].

They seemed to straddle both genres, but weren't particularly popular in either.

It seems a superficial similarity but aren't both women trying to make themselves heard in the great male conversation?

What if the funds overlap a great deal but aren't both aiming at the same index?

But those "things" are both liabilities, not assets.

Although homosexuality wasn't officially recognised (but wasn't penalised), both abortion and contraceptives were legal and available.

She regretted doing it, but is not BFFs with both.

The New York Times sought to be included in both tours, but was not invited.