Context: Different linguists therefore take different approaches to the problem of assigning sounds to phonemes. For example, they differ in the extent to which they require allophones to be phonetically similar. There are also differing ideas as to whether this grouping of sounds is purely a tool for linguistic analysis, or reflects an actual process in the way the human brain processes a language.

Question: What are assigned to phonemes by different linguists?
Answer: sounds

Question: What part of a human does language processing?
Answer: brain

Question: The phonetical similarity of what thing causes disagreements between linguists?
Answer: allophones

Question: What are assigned to phonemes by different languages?
Answer: Unanswerable

Question: What part of a human does allophone processing?
Answer: Unanswerable

Question: The phonetical similarity of what thing causes disagreements between phenomes?
Answer: Unanswerable

Question: Who takes different approaches to the problem of assigning sounds to allophones?
Answer: Unanswerable

Question: Who differs in the extent to which they requires phonemes to be phonetically similar?
Answer: Unanswerable