A connected smartphone is an awesome brain augmentation device if used correctly - to look up things in the moment you want to know them.
The key phrase is "if used correctly." Part of that is knowing when to look something up "in the moment you want to know them," and when looking up a particular thing can wait until later. Too often I see searches being made for answers to questions that don't warrant an immediate answer, interrupting the ongoing conversation or activity, or even diverting the whole train of thought onto a dead-end side spur completely unrelated to the original topic.
If it's germane to the present topic, then sure, look it up. If not, it can wait. If you forget to look it up later, then it wasn't that important.