Admittedly a super-thick shell presumably provides even better protection than a normal shell, but if, so to speak, the snails thought it worthwhile for this reason, they would have invested in it anyway!
(the snails; thought; it worthwhile for this reason) Context(the snails thought,List([116, 134))):(they; would have invested anyway; in it)
the snails thought,List([116, 134))
the snails they
thought would have invested anyway
it worthwhile for this reason
in it