why is "go out lonely" an incorrect variant?

[Kathrin]

Common Errors in English, Advanced Level

ESL/EFL Test #9 "This way and that", question 10

For the rest of their long married life my grandmother never let him go out lonely ever again.

(a) For the rest
(b) married life
(c) let
(d) lonely

Common Errors in English, Advanced Level

ESL/EFL Test #9 "This way and that", answer 10

For the rest of their long married life my grandmother never let him go out alone ever again.

Correct entry: alone
The error was: (d) lonely

You have not found the error.
For the rest of their long married life my grandmother never let him go out lonely ever again.
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why is "go out lonely" an incorrect variant?

Katrin

[Mister Micawber]

.
It does not really make sense. Loneliness is an ongoing affliction which we endure irrespective of any current activity.
.
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Native English teacher at Mister Micawber's