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<p>which involves using evidence from known languages and observed rules of language feature evolution to identify and describe the hypothetical <a href="page.php?w=proto-language">proto-language</a>s ancestral to each language family, such as <a href="page.php?w=Proto-Indo-European">Proto-Indo-European</a> and the <a href="page.php?w=Indo-European_languages">Indo-European languages</a>. However, this is largely a theoretical, qualitative pursuit, and linguists have always emphasized the inherent limitations of the tree model due to the large role</p><p>
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