Well "he" is never plural but "they" is sometimes singular (like the logical "some"). Does the sentence: "I was talking to someone about this and they thought

Well "he" is never plural but "they" is sometimes singular (like the logical "some"). Does the sentence: "I was talking to someone about this and they thought so and so." really sound weird to you? It doesn't to me. Also I wouldn't call it a "solution" because it wasn't just invented to solve this problem, it's just already common usage.