How to cast a doubt?

Question

how to cast a doubt?

Answer 1

Cause suspicion or doubt in another's

mind about something.  

Answer 2

use harry potters book of how to cast a doubt using 5 steps

1 get someone really boring like gordan brown

2 add jelly

3 get them to doubt something

4 bore em to death

5 add someone who smells  

Answer 3

Raise a question with a possible hypothesis.Some ways to express doubt are to ask:

Could it be?

What if?

Although he said...., is it possible that?

Some people have said...

I want to believe this but the facts indicate otherwise and say that...

Do you really believe that...

Is it possible that...

nobody has confirmed his story