would be best

[Kontol]

Why is "would" used instead of "is" in this sentence? Is the speaker talking about hypothetical situation?

A: When shall I ring you?
B: After six would be best

 

[jutfrank]

Another question about would.

I think you might profit from a more pragmatic line of thinking about this, so instead of answering directly, let me ask you to tell us what you think the speaker really means to do here. What do you feel this sentence does that After six is best doesn't do?