- But if it hadn't been for that drink last night, all this might not have happened.
- Apparently nothing did. What made you think it had?

11 seconds sound clip from the The Philadelphia Story movie soundboard.

You can hear this line at 01:44:42 in the Blu-ray version of the movie.

Quote context

[...]

- You see, it really wasn't Tracy at all. It was another girl. A Miss Pommery 1926.

- You'd had too much to drink, Tracy.

- That seems to be the consensus of opinion.

- Will you promise me never to touch the stuff again?

- No, I don't believe I will.

- There are certain things about that other girl, that Miss Pommery '26, I rather like.

- But a man expects his wife to...

- To behave herself. Naturally.

- To behave herself naturally. Sorry.

- But if it hadn't been for that drink last night, all this might not have happened.

- Apparently nothing did. What made you think it had?

- Well, it didn't take much imagination.

- Not much, perhaps, but just of a certain kind.

- It seems you didn't think anything too well of yourself.

- That's the odd thing, George. Somehow I'd have hoped that you'd think better of me than I did.

- I'm not going to quibble. All the evidence was there.

- And I was guilty straight off. That is, until I was proved innocent.

[...]