1.) "Nobody move and nobody get hurt."
When this sentence is shouted out by bank robbers at the customers inside a bank, then the customers know pretty darn well what is being communicated: If nobody moves, then nobody gets hurt. That is, if you are a bank customer and you don't want to get hurt by the robbers, well, one way to not get hurt is to not move.
In the other thread, the OP wanted to know if a sentence in a wikipedia page was grammatical: http://en.wikipedia.org/wiki/Nobody_Move,_Nobody_Get_Hurt
Nobody Move, Nobody Get Hurt is a cliche from hold-up movies, and may refer to: . . .
And the OP was also wondering about the version:
- 2.) "Nobody move and nobody gets hurt."
Basically, the two versions really only differ in the clause type of the 2nd clause in the coordination:
Both versions use an imperative clause as the 1st coordinate. The difference is that the #1 version uses an imperative clause for the 2nd coordinate, while #2 uses a declarative clause for its 2nd coordinate. But both #1 and #2 versions basically have the same interpretation: If you don't move, then you don't get hurt. The sentences are interpreted as if they were a conditional construction. The directive force of "Don't move!" is retained in both versions.
In any case, they most certainly do not have the meaning:
- 3.) "Nobody move or get hurt."
If bank robbers yelled "Nobody move or get hurt!", then the bank customers might glance at each other, wondering what in the world was going on. (Eventually, the customers might figure out that the bank was getting robbed by EFL speakers.)
Often, there are some EFL speakers (and pedants) that assume that the coordinator "AND" can only be involved in symmetric constructions: constructions where the order of the two coordinates can be reversed with no change in meaning of the sentence. E.g.
In those above two versions, they both have the same meaning.
But their understanding about the coordinator "AND" is wrong.
Because "AND" is also commonly involved in asymmetric constructions: constructions where the two coordinates resist having their order be reversed, or when reversed, cause the sentence to have a different meaning. Here below are some examples of asymmetric constructions.
Temporal sequence: "X and Y" implicates "X and then Y"
Here, there is a temporal sequence of the events. In this case, for #B1, that he got up and then had breakfast, while for #B2 that he had breakfast in bed before getting up out of bed.
Consequence: "X and Y" implicates "X and therefore Y"
- C. "I fell off the ladder and broke my leg."
You can infer that I broke my leg as a result of falling off the ladder. (Reversing the coordinates is not an acceptable alternate.)
Condition: "X and Y" implicates "if X then Y"
- D.1 "Do that again and you'll be fired."
This implicates that "if you do that again then you'll be fired". This example has an imperative clause and a declarative clause. The following example has two imperative clauses, (which is somewhat similar to the form of this thread's OP's example)
- D.2 "Join the Navy and see the world."
which has the meaning "that you'll see the world if you join the Navy".
Concession: "X and Y" implicates "despite X, Y"
- E. "You can eat as much of this as you like and not put on weight."
Temporal inclusion: "X and Y" implicates "X while Y"
- F. "Did he come in and I was still asleep?"
Formulaic frames: And there are expressions where the constructions of "X and Y" are sorta idiomatic or are idioms or are fixed or are partly fixed. Some examples are:
"The coffee is nice and hot."
"Try and not be so touchy."
"Be sure and lock up."
"The TV has gone and broken down."
"They sat and talked about the wedding."
"Be an angel and make me some coffee."
And there's also asymmetric constructions involving the coordinator "OR". For example,
Condition: "X or Y" implicates "if not X, then Y"
"I'm leaving before the end or I'll miss my train."
"I left early or I would have missed my train."
"Hurry up or we'll be late."
"Don't do that again or you'll be fired."
. . .
And so, hopefully you've gotten the picture. There are a lot of asymmetric constructions, and they are part of today's standard English. We native English speakers use them, easily and often.
Note that most of the examples and most of the info were borrowed from the 2002 reference grammar by Huddleston and Pullum et al., The Cambridge Grammar of the English Language (CGEL), pages 1299-1304.
EDITED for adding links:
Here's my post in the other thread that discusses the grammaticality of the two versions:
Here's my post on imperative clauses with a 3rd person subject: