If many more welfare parents do find and hold jobs, their children might well benefit from the intellectually stimulating care many of their mothers cannot provide--if that's the sort of substitute care they actually get.
Children of parents with jobs are intellectually strong.
mnli hypothesis: Children of parents with jobs are intellectually strong. premise: If many more welfare parents do find and hold jobs, their children might well benefit from the intellectually stimulating care many of their mothers cannot provide--if that's the sort of substitute care they actually get.