Why does the ESV have John 1.18 as "the only God" rather than SON as other translations?
The question behind the question is how to use LOGOS to quickly find the answer.
John 1:18 (ESV) No one has ever seen God; the only God, who is at the Father’s side, he has made him known.
John 1:18 (NIV2011) No one has ever seen God, but the one and only Son, who is himself God and is in closest relationship with the Father, has made him known.
John 1:18 (NA28) Θεὸν οὐδεὶς ἑώρακεν πώποτε· μονογενὴς θεὸς ὁ ὢν εἰς τὸν κόλπον τοῦ πατρὸς ἐκεῖνος ἐξηγήσατο. (Emphasis added.