difference between "That is why" and "which is why"

[pritychhetri]

What is the difference between "that is why" and "which is why"?

When to use that is why and when to use which is why?

 

[chester_100]

What is the difference between "that is why" and "which is why"?

When to use that is why and when to use which is why?

-I couldn't pass the course, which is why I have to take it again.

In such sentences, which directly refers to the sentence preceding it, and we should put a comma before it.
We can't start a new sentence by which.


-I couldn't pass the course. That is why I have to take it again.
In this one, that, even though it is semantically related to the sentence before it, canstart a new sentence and isn't structurally dependent on the preceding sentence.


I don't find it necessary to get into more detail.

 

[Rover_KE]

That's an excellent answer, Chester.

Rover

 

[chester_100]

That's an excellent answer, Chester.

Rover

Thank you very much.

 

[pritychhetri]

Thanks a ton for the answer!!

I was basically talking about speaking English.

As per your answer, I see that meaning point of view there is no difference, but in the writing it makes a difference.

Like putting the comma in case of which.

So, I guess, I need to make sure that while speaking it is always better to use that is why.

what do you say?

 

[Rover_KE]

It's probably more likely to be used that way, but 'which is why' is also possible.

Rover