def evaluations_for_student_and_ci(student_name, ci_name)
  student_names = student_name.split ' '
  ci_names = ci_name.split ' '

  student = User.find_by_first_name_and_last_name *student_names
  ci =      User.find_by_first_name_and_last_name *ci_names

  student_memberships = student.user_identities.first.memberships.map &:membershipable_id
  ci_memberships      = ci.user_identities.first.memberships.map &:membershipable_id

  student_memberships & ci_memberships
end