Because the F/A-18 E/F was a variant of the older F/A-18 aircraft, the developer had prior knowledge of design and manufacturing problems.
The developer had never seen an aircraft like this before.
mnli hypothesis: The developer had never seen an aircraft like this before. premise: Because the F/A-18 E/F was a variant of the older F/A-18 aircraft, the developer had prior knowledge of design and manufacturing problems.