別物

別物

Something different; another thing.

Here, '別物' is used to imply that two items are inherently different despite appearing similar.

見た目は似ているが、実際には別物だ。

They look similar, but in reality, they are different things.

In this case, '別物' refers to two abstract concepts being distinct from each other.

経験と知識は別物として扱うべきだ。

Experience and knowledge should be treated as different entities.

Here, '別物' emphasizes the complete distinction of the subject from a simple misstep.

それは単なるミスではなく、全くの別物だ。

That is not a mere mistake; it's something completely different.