Antipodean Bucket Farmer wrote:
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Technically speaking, what is the difference between a
fruit and a vegetable?..............................

Even though you have received a very thorough answer, let me try a short
version:

Between fruit and vegetable, it isn't either/or because most vegetables
produce some sort of fruit in their life cycle if you grow them to maturity.
With some vegetables, the part you eat is the root. (carrots)
With some vegetables, the part you eat is the leaves. (spinach)
With some vegetables, the part you eat is the seeds. (corn)
With some vegetables, the part you eat is the developing flower head.
(broccoli)
With some vegetables, the part you eat is the fruit. (tomatoes)
etc.
etc.

Steve