Here are a few interpretations and answers:
1. Identical:
* A perfect copy: If you mean "exactly the same," then the only thing like something else in all ways is an identical copy. This could be a photocopy, a clone, or a perfectly replicated object.
2. Similar but not identical:
* Twins: Twins share a lot of similarities but are not exactly the same.
* Analogies: Analogies draw comparisons between two things that are similar in some ways but different in others.
* Metaphors: Metaphors are similar to analogies but use figurative language to create a strong comparison between two things.
3. Philosophically challenging:
* The concept of "self": This is a deep philosophical question. Some might argue that nothing can be truly "like" something else in every way because everything is unique.
Could you tell me more about what you're looking for? Do you have a specific example in mind? Knowing your intention will help me give a more helpful answer.