When I grew up, there were 4 "securitylevels" when leaving the house:
- Unlocked, noone answering bell = normally back within an hour or so
- Locked but key left in the lock = (to inform a visitor, parent or child) : noone at home, but will return within short
- Locked, key under broom or doormat = away for hours (e.g. at work)
- Locked, key on nail in garage = on holiday
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