Expressions of Certainty and Uncertainty

I'm sure.

A2

I am certain.

I'm certain.

A2

I am confident.

Definitely.

A2

Without a doubt.

Absolutely.

A2

Completely; without question.

For sure.

A2

Certainly.

I think so.

A2

I believe it's likely.

I believe so.

A2

I have reason to think it's true.

I guess so.

A2

I suppose it's possible.

Probably.

A2

Likely.

Maybe.

A2

Possibly.

Perhaps.

A2

Possibly.

I'm not sure.

A2

I am uncertain.

I don't know.

A2

I lack knowledge about this.

I doubt it.

A2

I think it's unlikely.

It's unlikely.

A2

It's improbable.

I'm not certain.

A2

I'm not completely sure.

It's possible.

A2

It could happen.

I suppose so.

A2

I think so, although I'm not completely sure.

I'm not convinced.

A2

I'm not persuaded.

It's a bit uncertain.

A2

The situation is somewhat unclear.

I'm absolutely sure.

B1

I have no doubt.

There's no doubt about it.

B1

It's certain.

I'm certain.

B1

I'm confident.

It's highly likely.

B1

It's very probable.