The upādhi having-a-perceptible-body presupposes that pervasion holds between perceptible-bodied agents and effects we observe, but grass-growth already falsifies this universal claim, making the upādhi self-undermining rather than defeating.

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Self-undermining(in logic and argument): When an idea or rule contradicts itself or destroys the very thing it's trying to achieve.
epistemology(Contrasted with purely descriptive scientific inquiry): A normative enterprise that tells us how we ought to reason from evidence and how we ought to justify our beliefs, as distinct from merely describing how we do reason or justify beliefs
pervasion(as used in Indian philosophy of logic): In logic, the idea that whenever one thing is present, another thing must also be present—like saying 'all smoke means fire' because smoke always goes with fire.
universal claim(as used in logic and argumentation): A statement that says something is true in every single case with no exceptions, like 'all birds can fly.'
upādhi(Nyāya-Buddhist debate on inference (anumāna)): A property that pervades the probandum (is entailed by the presence of the probandum) while failing to pervade the prover (is not instanced in at least one case of the prover); its presence defeats an inference by showing the required pervasion between prover and probandum does not hold

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