Yup, this is true. Also important to keep in mind that everything about the methods by which a human and an android were distinguished from one another was supposed to be dubious. The only "100% sure" way was to literally kill them and dig out bits of their brain (which apparently do not look different from human parts) and send it to some lab for "testing." Exactly what is and isn't an android is very ambiguous. I like 60% think that everyone featured in the book is an android and that life on Earth is completely extinct.