He wasn't at all sure of how much he could extrapolate from what he'd read in the book on Applied Semantics, but he knew he needed a control--a symbol of the symbol, in this case.
He read a lot about Applied Semantics.
mnli hypothesis: He read a lot about Applied Semantics. premise: He wasn't at all sure of how much he could extrapolate from what he'd read in the book on Applied Semantics, but he knew he needed a control--a symbol of the symbol, in this case.