I've learned that "It's OK" and "That's OK" both are pretty much interchangeable, and that "it's okay" tends to be used when a mistake is made. (I'm sorry I stepped on your foot"...It's okay.)
Does that apply to "It's/That's no problem.", too? Are both interchangeable? Thank you.
Top answer
Yes, but in most cases the casual expression is simply 'No problem! ' Clive
— Clive
Yes, but in most cases the casual expression is simply 'No problem!
' Clive
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