# A Test of Common Sense

Imagine you are a couple of window cleaners and you are presented with a glass fronted building like this.

The two doors are electric and will automatically open if anyone, including yourself, approaches them from the inside or outside. Whilst answering the question below, keep in mind this is lunch time, which happens to be the busiest time of the day for people entering and leaving this building.

Which of the following approaches would you choose? (pick only one)

1. Lock one of the doors. Clean the glass above the locked door. When the water has stopped flooding down unlock the door. Lock the second door. Clean the glass above the locked door. When the water has stopped flooding down unlock the door.
2. Lock both doors. Clean all the glass. When the water has stopped flooding down unlock both doors.
3. Come back another time when there aren’t hordes of people trying to get through the doors, and clean the glass using the method outlined in (1), or maybe even (2).
4. Leave both doors unlocked. Clean the glass above both doors so water is flooding down both of them at the same time. Since you are each standing in front of the doors, they keep opening and some of the water runs into the building.

I think you can guess which one I witnessed today. I truly worry for the future of the human race!

Cheers

Tim…

## Author: Tim...

DBA, Developer, Author, Trainer.

## 8 thoughts on “A Test of Common Sense”

1. Jeffrey Kemp says:

I’ll choose #5, the engineer’s solution: add gutters above the doors 🙂

2. Rafael says:

3) option is muy choice.

3. Parthiban Nagarajan says:

Hi Tim

What happened? You were in second scenario? So sad.

4. Niall Litchfield says:

It depends on whether my mate and I have been given 5 buildings to do in the time that is normally allowed for 4 and been told I don’t get paid at all if they don’t get done 🙁

5. Time is an illusion – Lunch time, doubly so.