>> Cause and effect is always testable.
>> "Because" is an expression of cause and effect.
>> So, those plants that produce nectar today do
>> so solely because their ancestors did so, and got pollinated.
> I wonder how one would go about testing this?
Cover an insect-pollinated plant with netting to exclude pollinators, and
see if you can get any offspring from it.
Some induction is required, but seeing is bee-lieving.
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