get rid of me so/that easily

[Topstudent]

A man tries to run away from a guy who wants to harm him. After a long chase the man loses the guy and stops to catch his breath. But suddenly the guy stands behind him.

Guy: Did you really think you could get rid of me so/that easily?

Are 'so' and 'that' interchangeable here? Or is one of them more natural/appropriate to use in this context?

 

[emsr2d2]

In BrE, I find only "that" natural.

 

[jutfrank]

Both are equally natural, and effectively interchangeable in the context.

 

[SoothingDave]

I disagree. Only "that easily" is idiomatic.

 

[jutfrank]

In this context, 'so easily' means 'as easily as that' or 'as easily as you apparently assumed'. It's just another way of saying the same thing.

 

[Skrej]

Both work equally well for me.

 

[Amigos4]

Both work equally well for me, also.