You are arguably correct in that we are probably able to make that judgement.
On the other hand, if you were explicitly inviting us to do so, you ought to have used 'may' rather than 'can', I believe. I might be wrong though - would any grammar fans care to help out?
(BrianHequator was stretching owls, on, or around, Wed 15 Jun 2011, 14:47, 2 replies, latest was 15 years ago)

Do we have to?

(The Luggage is haunted..., Wed 15 Jun 2011, 14:48, Reply)

That always irritated me.
There was a teacher who would reply to "Can I go to the toilet?" with "Well, you're able to, but may you?".

I think can is able to and may is allowed to.
( Lampito rise with the moon, go to bed with the sun, Wed 15 Jun 2011, 14:50, Reply)

People who say that are fucking twats
It's clearly implicit in what you said that you were requesting permission, not asking them if you were capable of doing it. I onlce asked at a ticket office if I could have a one day travel card and she said "You can buy one, you can't have it for nothing!" in a LOLwaki joking manner. I wished she had died.
(Bazongaloid, Wed 15 Jun 2011, 14:54, Reply)