Does "However, this definition becomes problematic in the case of dialect continua, in which it may be the case that dialect B is mutually intelligible with both dialect A and dialect C but dialects A and C are not mutually intelligible with each other." contain the correct answer to "What is the term for when dialects A and B are mutually intelligible, dialect B and C are mutually intelligible, but dialects A and C are not mutually intelligible?"
yes