You could, perhaps, but I couldn't.

1 seconds sound clip from the The Alamo (1960) movie soundboard.

You can hear this line at 00:18:40.829 in the Blu-ray version of the movie.

Quote context

[...]

- I'd say we have two or at best three days before we see his banners.

- The men were listening.

- And I can't let that rabble know how weak we are and how strong the enemy is.

- You couldn't do that, eh?

- No, I couldn't.

- My honest and truthful and plain-spoken friend.

- You could, perhaps, but I couldn't.

- Now, take a look at this. This oblique rampart here...

- Well, have sense, Dick!

- Why should those men stay if they knew the truth of our situation?

- It's different for Bowie, of course.

[...]