I'd back John on this . For a brewery to be Irish I reckon the fermentation should be done in Ireland at the minimum . The ingredients have to be turned into beer here. A company can be Irish . It can also be a brewery . But to combine the two requires fermenting wort into beer in Ireland .
I don't think the computer manufacturing example applys to beer . They don't put a big made in Ireland sticker on the case, or claim the computer as 100% Irish as a selling point . So yep they can outsource all they want to acheive the best quality and price.
Thought occurred . Tullow oil is an Irish co. They never claim their oil is Irish though ......