Am I being an idiot or what?

No.

You're looking into it too much..

The wall has already been built ;D

George said:

No.

You're looking into it too much..

The wall has already been built ;D

Click to expand...

Did you resign?

One said:

George said:

No.

You're looking into it too much..

The wall has already been built ;D

Click to expand...

Did you resign?

Click to expand...

50/50.

If it were an exam question i would put: There is an insufficient amount of quantitative information supplied to suggest the time would double with half the men, however much sense it makes logically. So It may or may not take 20 hours. ;P more of a politicians answer, but that's exam technique for you