The entire thing was built by some amateurs with screwdrivers and plywood.
The obvious inference was that myxoedema, goitre and cretinism were due to thyroid failure.
The well-known theorem of Tarski that truth of sentences in any reasonably expressive language L cannot be defined in the language L itself is proved by a diagonalization argument similar to the argument involved in Russell's paradox. […] It is usual to think that Russell's paradox excludes large sets like the universe, but this is actually not the case. An alternate solution to Russell's paradox (and other paradoxes) was proposed by Quine (1937) in his system New Foundations (NF): comprehension restricted to stratified formulae.
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New Foundations
The beast that bears me, tired with my woe, Plods dully on, to bear that weight in me,
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