It could always be replaced, if you think it's important.
3 seconds sound clip from The Hitchhiker's Guide to the Galaxy (1981) - Episode 4 sitcom.
You can hear this line at 00:25:45.905 in the Blu-ray version of the TV Series.
Quote context
[...]
- What?
- What?
- What?
- Well, that's all right, isn't it? Who'd miss it?
- I thought you said you could just read his brain electronically?
- Oh, yes. But we'd have to get It out first. It's got to be prepared, treated. Diced!
- It could always be replaced, if you think it's important.
- Yes. An electronic brain, a simple one should suffice.
- What?
- Oh, no, you wouldn't. You'd be programmed not to.
- I'm sorry, mice, old mates, but I don't think we've got a deal.
- Hey, let's not be hasty, I mean, think of the spondulics!
[...]