Jawabanmu

2014-08-03T19:26:55+07:00
Certainty = yakin.
Uncertainty = tidak yakin/ragu.
Asking certainty·         
Are you sure that -blablabla-?
     
Are sure about -blablabla-?
·         
Do you think that -blablabla-?
·         
How do you so sure?
·         
Are you positively sure?

Respond or express certainty·         
Yes, it confirmed
·         
I am definitely sure
·         
Of course
·         
Sure, I am certain
·         
I have no doubt about it

Giving Uncertainty·         
I am not sure
·         
I am not certain of it
·         
I doubt of it
·         
I afraid that it is wrong
·         
Sorry, I am not sure about it
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2014-08-03T21:54:10+07:00
Expressing Certainty 
- Yes, it confirmed
- I am definitely sure
- Of course
- Sure, I am certain
- I have no doubt about it

Expressing Uncertainty
- I am not sure
- I am not certain of it
- I doubt of it
- I afraid that it is wrong
- Sorry, I am not sure about it

Semoga membantu~