Hi, Giantpegasus!
I want to have dinner at a restaurant, I take all the required time to choose one using many criteria (food type, quality, reputation, zone, parking, all that I consider properly), I make a reservation, I go there, I enter, I inform about my reservation, I take a table, I choose the menu, I place the order, I dinner, I ask the waiter to bring me the bill, I check it to be Ok, I give him my credit card while say "Do you accept Mastercard, don't you? I'm in a rush, so sorry if I should have asked before" He embarrassingly uncomfortable says "I apologize, sir, but we only accept AmEx and Visa as stated at the entrance and at our website".
A basic principle of any law system anywhere says that no one can neither allege nor claim ignorance of any law or other legal disposition. That means, rules rule. Here the rules are these:
http://chandoo.org/forum/forums/new-users-please-start-here.14/
Call it our Constitution if you want. Within it, and specifically here:
http://chandoo.org/forum/threads/new-users-please-read.294/
it says, just for quoting a couple of guidelines:
Please take a few minutes to read this list of Rules, Procedures and Etiquette's for posting on the Chandoo.org Forums.
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In the 1st case probably "I" initially would think that I acted correctly but being reasonable I should realize that I didn't acted correctly. Sooner or later, if not immediately, but I definitively should.
In the 2nd case only my 2 year old nephew would think it. In fact neither him, but only his 1 year old little brother.
Regards!