[bmacho]

This reasoning is nonsensical.

There is nothing to refute in it, but, just to prove it wrong: sarcasm is commonly denoted in spoken English by intonation.

[emmet]

And as we all know, it is impossible to imply tone in written text.

[medstrom]

Exactly, it is the illusion of transparency. Have someone read something you've written out loud, you'd be surprised how often they use a different tone than you had in mind. Add to that a variety of cultures and backgrounds.

[quietbritishjim]

The comment you're replying to was being sarcastic. (I'm not sure about you!)

[incognito124]

Ironically, proving the (wrong) point

[medstrom]

Yes, I read it that way too. Which meant that they were under the impression that it is easy to infer tone, so I replied with a serious explanation why it may not be.

[bmacho]

It is possible to do that, but sarcasm in written text uses a different notation: /s, which you just proposed to abolish above.

I don't like your replies, so I stop this conversation with you.