Wissen (to know) refers to factual knowledge or information. It is about understanding concepts, facts, or processes.
Examples:
* Ich weiß, dass die Erde rund ist. (I know that the Earth is round.)
* Ich weiß, wie man ein Fahrrad fährt. (I know how to ride a bike.)
* Ich weiß, wer der Präsident ist. (I know who the president is.)
Kennen (to know) refers to familiarity with something or someone. It is about having a personal experience or relationship with something.
Examples:
* Ich kenne Berlin. (I know Berlin.)
* Ich kenne diesen Mann. (I know this man.)
* Ich kenne die Regeln des Spiels. (I know the rules of the game.)
Here's a simple way to remember the difference:
* Wissen is used for facts and information.
* Kennen is used for people, places, and things you are familiar with.
Here are some helpful tips:
* You can use "wissen" with "dass" to introduce a fact or statement.
* You can use "kennen" with "den/die/das" to indicate familiarity with a specific person, place, or thing.
In conclusion, "wissen" is about knowledge, while "kennen" is about familiarity.