Meaning of と言う訳だ(というわけだ) in Japanese

Examples of と言う訳だ, というわけだ in a sentence

• 新婚なのに子供？そう・・・息子は父親の連れ子。彼はバツイチというわけだ。

  Newly weds but with a child? Yes, that's right - the son is from the father's former marriage. He's been divorced once.

• 全く嘘と言う訳ではない。

  That is not altogether false.

• 金で何でも買えるというわけでない。

  Gold will not buy everything.