But she was ready to take chances.

She chanced the railway, and it came off; she chanced your remaining in the theatre, and that came off too.

She calculated on the probability of your getting tea when you came out, and she hit it off again.

And then she took one chance too many; she assumed that you probably took sugar in your tea, and she was wrong." "We are taking it for granted that the sugar was prepared," I remarked.
"Yes.

Our explanation is entirely hypothetical and may be entirely wrong.