Professor Beckstein: American Sign Language is the native language of many North Americans.
Becksteins Claims
(explicit) 1. ASL is the native language of many N. Americans 2. ASL is not a foreign language 3. No students should be permitted to satisfy the university's foreign language requirement by learning it.
(implicit) 1 → 2. If X is a native language of many North Americans, then it's not a foreign language. 2 → 3. If X isn't a foreign language, then no student should be allowed to satisfy the university's foreign language requirement by learning it. 1 → 3. If X is a native language of many North Americans, then no student should be allowed to satisfy the university's foreign language requirement by learning it.
Sedleys responses
1. No comment 2. No comment 3. No comment
1 → 2. Kinda disagrees. Disagreeing would mean that you're saying . While it appears that Sedely would consider French and Spanish examples of this, she technically never establishes that she consider them foreign languages.
2 → 3. Kinda disagrees. Sedley thinks that it's okay for a student to satisfy the university's foreign language requirement by learning a language that is the native language of many North Americans. But disagreeing with Beckstein's final move means saying, Sedley doesn't provide a clear example of "X isn't a foreign language but it is okay to satisfy the foreign language requirement.
1 → 3. Definitely disagrees.
Evaluate / Goal
Beckstein makes a three part argument: X is native lang → X is not a → Can't satisfy of many NA's foreign lang foreign lang req w/ X
Taken together, Beckstein thinks that if X is a native language of many North Americans, then learning it can't satisfy the university's foreign language requirement.
Sedley disagrees. She gives the examples of French and Spanish, which are the native language of many North Americans, but clearly can satisfy the university's foreign language requirement.
So let's look for an answer addressing the connection between those two concepts.