Dialectical tensions are confined to external conflicts in which the desires of two relational partners clash with one another.

Answer & Explanation :

A dialectical tension is opposition / contradiction in behaviour of a couple.

Oppositions are antonym of each others, act as cancelation or undo to each other. They are mutually exclusive & mutually exhaustive. They can be related to their internal, external conflicting issues.

Examples :

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answer; have joints that fail from excess by early the accumulated effects of unnoticed infections,all of these things are possible for a person born without the ability to feel pain;