Well why not. We need him to give a unambiguous legal statementClaim: ALL green areas are fuel storage - False
PAC Engineer: "yeh jo green portion hai yeh integral fuel tanks wala area hai" (This green portion here is the integral fuel tank area")
That is the PAC Engineer has NOT claimed that "ALL green areas are fuel storage". He said "THIS green area is fuel storage". Therefore, there might be other green areas that are NOT integral fuel tanks. This is a simple exercise in logical reasoning. Hence my Venn diagram.