The thumb has a different name compared to the other fingers (index, middle, ring, little) and it does not end with "finger".
Also, when referring to the hand, I have seen literature where it is described as "5 digits on each hand" and that is probably more accurate.
In light of that,
- Is saying that I have "5 fingers on my left hand" technically just wrong?
- Or is the thumb a "special" type of finger and so it is acceptable to treat it as a finger in general?
Are there any rules/guidelines related to this in English that anyone can throw light on or is it that I am just nitpicking?