Questions & Answers about Και οι δύο είναι εδώ τώρα.
That is a very common question. On its own, και usually does mean and. But in the fixed expression και οι δύο, it means both.
So:
- και = and
- οι δύο = the two
- και οι δύο = both / both of them
This is an idiomatic Greek pattern. You should learn και οι δύο as one unit meaning both.
In Greek, οι δύο literally means the two. When Greek says και οι δύο, it gives the sense of both (of them).
Compare:
- δύο άνθρωποι = two people
- οι δύο άνθρωποι = the two people
- και οι δύο άνθρωποι = both people
So the article is not random here. It helps create the meaning both.