Abstract 1. Introduction 2. Assimilation as a Feature Sharing 3. Positional Faithfulness vs. Positional Markedness 4. Apparent C2 Dominance Effect 5. Assimilation across Morpheme Boundary 6. Implication for Further Issues 6.1. The Syllable Contact Law 6.2. Assimilation to the Unmarked 7. Conclusion References