An undergraduate at Stanford may combine a major in Symbolic Systems with another major as either a Double/Multiple Major (which severely restricts double counting across courses between the two majors) or with one of the majors designated as a Secondary Major (which allows double counting without restriction). More information is available at the Stanford Bulletin: Explore Degrees website. With a double major, both majors are listed on a student's diploma. Secondary majors are not listed on a student's diploma, but the transcript is annotated to note that the requirements for the secondary major have also been met, and of course this may be stated on a student's resume.
If a student double majors in Symbolic Systems and another major, any overlapping course requirements will have to be met within the university's policy against double counting. This means that unless a course is an introductory skill requirement for both majors, different courses must be taken to fulfill the overlapping course requirements for the two majors, even if one course is listed by both programs as fulfilling one of their major requirements.
If a student decides to count a course toward another major while double majoring in Symbolic Systems, and the course is not on our list of introductory skill requirements, then the student will need to take a different course to fulfill any of the requirements for the Symbolic Systems major. If no other courses are listed as fulfilling the Symbolic Systems requirement other than the one counted for another major, you should email symsys-directors at lists dot stanford dot edu and propose a substitute. Generally speaking, substitution courses must be at the same level or higher and in the same area as the course that is being counted for the other major when requirements overlap.