Searching "不清" - Zhictionary

Tom couldn't tell the difference between play and struggle.

I can't understand what you say when you're crying.

世界上任何人的独自活动，都是清醒而目标明确的，然而一旦被生活的洪流聚在一起，就变得混沌不清了。

All individuals in the world act with clear goals and distinct intentions. But once these actions are brought together by the great torrents of life, clarity recedes and chaos ensues.

Everyone in the world starts off with goals set out and a clear purpose. But once these are jumbled up by the torrents of life, everything descends into chaos.

Source: Tatoeba

庄子曾梦见自己化身为蝶，当他醒来，他分不清是自己刚刚梦见自己变成蝴蝶呢，还是蝴蝶正梦见它变成了庄子。

Once, Zhuangzi dreamed he was a butterfly, but when he woke up, he wasn't sure whether he was Zhuangzi who had dreamed being a butterfly or if he was a butterfly now dreaming he was Zhuangzi.

Once, Zhuangzi dreamed he was a butterfly, but when he woke up, he wasn't sure whether he was Zhuangzi who had dreamt being a butterfly or if he was a butterfly now dreaming he was Zhuangzi.

Source: Tatoeba

我记不清奶奶的脸。

I don't remember my grandmother's face accurately.

Source: Tatoeba

我分不清他和他的弟弟。

I can't distinguish him from his brother.

Source: Tatoeba

我記不清昨天下午茶吃了什麼。

I can't remember what was for tea yesterday.

Source: Tatoeba

我还搞不清。

I'm still confused.