You are attacked by a GNU

> Go through door.

I do not understand

> Enter door.

If you want to go thru the door you should say so.

Go through door.

I do not understand “go through door.”

Go thru door.

You go through the door in to the next room.

In a GUI the designer of the GUI sets the vocabulary that will be used to interact with the software.

We have evolved that vocabulary over many years.

Each new app refines and evolves that vocabulary a little more, e.g. nobody thought to do “pull down to refresh” a decade ago until we had the affordance that a ubiquitous touch screen gives us.

Now, pulling down to refresh, swiping left and right, and pinch zooming are second nature.

When you switch to a chat interface, that vocabulary of interaction design is removed.

And all that remains is a boundless dictionary of words, often misspelled by both the users and the designers, and user frustration once they proceed beyond simple interaction.