What is it called when you think straight?

There isn't a single perfect phrase for "thinking straight" because it's a nuanced concept. Here are some options depending on the specific meaning you want to convey:

General Clarity and Logic:

* Thinking rationally

* Thinking logically

* Thinking clearly

* Thinking critically

* Being objective

* Having sound judgment

Avoiding Biases and Emotions:

* Thinking objectively

* Thinking without prejudice

* Thinking impartially

* Being unbiased

Being Straightforward and Honest:

* Speaking your mind

* Being direct

* Being truthful

* Being candid

Focusing on the Facts:

* Being realistic

* Seeing things as they are

* Staying grounded

The best term will depend on the specific context and what you want to emphasize.