On a whole life of exposure to things that give cognitive decline, apart from that happening naturally with aging (of course with overlap between those two things) the effect is probably not that big, but these last years research has shown that no amount of alcohol is safe for brain health. So you probably lost some cognitive function. But thievish probably not that significant against a whole life. And besides brain plasticity (which is mostly activated by using it) makes it so that this is a sort of unanswerable/unmeasurable question.

In short since it is in the past (don’t know how much) and was only a year, and I’m assuming you didn’t go on a weekly blackout drinking session; don’t stress about it too much, that’s not good for cognitive function ;p

And also for the price of the extra gasoline

Aside from the environmental impact of driving 10 (!) Extra miles (or at all) for a tiny bit of extra ice cream, which is neither healthy nor needed. It just doesn’t make sense on a personal financial level to waste so much gas to get a cheaper (per volume) treat. For a European driving to get ice cream alone is ridiculous as many placed have ice cream shops in the town we live in that we walk or bike to.