It seems that addition (for instance) was "created" long before us.
On the other hand, it seems highly unlikely that a civilization similar to ours could "invent" an essentially different kind of mathematics (or physics, etc.)
Parents do not have to be "experts in chilhood development" to know what is best for their children. Especially experts in their fields like the manufacturing of alcohol, guns or other products universallly considered dangerous.
Quite often clients were more powerful than servers. Hell, at one point a CPU embedded into a printer could be faster than, say, 8088. An X server (running on the client side) often required a more powerful machine than one running X clients (i.e. a server). A web browser is not an exception.
Not exactly. Pronunciation varies between dialects and accents; it is the subject of a linguistic discipline called "phonology"; writing systems or difficulties arising from their "irregularities" with respect to spoken word do not concern it. Put differently, speech and pronunciation, while related, are not the same.
I believe you.
> I already buy from Steam.
I believe this even more.