Philosopher George Berkeley mused whether a tree falling down in a forest would still make a noise even if there was no one there to hear it.
Similarly this column has wondered whether the airy south Belfast haven of Cafe Conor, named after artist William Conor whose studio was in the same spot, exists outside weekends when one and all are relaxed enough to enjoy its good food and pleasant, lofty-ceilinged ambiance.
It's a bit far flung for a Tele journalist to enjoy on a school day and still make it back within the hour but the Cafe Conor experience on a Sunday must surely translate to a weekday.
We arrive in around 2.30pm on Sunday and are pleased to find the breakfast menu is still on offer.
I plump for a modestly priced sausage bap (£3.95) while my hungry partner gets tucked into the 'big breakfast' (£6.95), bursting at the seams with sausages, bacon, black pudding, beans, soda bread and potato bread.
Service is nearly impeccable and the waiters are friendly. Food and four coffees comes to just under £20.
The caricature bust of Sylvester Stallone on the ledge next to me is a talking point (surely not a Conor original) and there are plenty of people-watching opportunities... though the charm of such pursuits appears to be lost on the tearful kids sitting close to us.
I'm pretty sure Bishop Berkeley would enjoy lunch here any day of the week, as would William Conor.