If Bob says "kilobyte" to Alice, and Bob means 5432 bytes, and Alice perceives him to mean 5432 bytes, then in that context, "kilobyte" means 5432 bytes.
If Bob says "kilobyte" to Alice, and Bob means 5432 bytes, and Alice perceives him to mean 5432 bytes, then in that context, "kilobyte" means 5432 bytes.
What are the odds of Charlie meeting Bob and Alice?
Is charlie a marketing exec?
No, in that context, kilobyte means 1024 bytes, like in every other context.