I think its funny that a dictionary disagrees with you on this too.
Dictionaries disagree with me on how I have stated dictionaries are compiled? Or they disagree with me on the specific definition of "computer"?
And why shouldn't everyday people have set definitions?
I'm not telling you what should and should not be; I'm telling you what is. English is not a prescriptively defined language. Linguists, including dictionary compilers, do not regard English as prescriptive. A dictionary
aims to reflect common usage, but the only correct way to find out the correct definition of an English word is to find out how English speakers use it.
It doesn't have to be in scientific language, but it should still retain the same meaning, and your laymans term of "A thing with a screen, keyboard and mouse" varies from the meaning significantly.
Highlight where I've used that definition, please. Try not to ignore the posts where I've made it explicit that a keyboard is
not necessary.
Mathematics is an abstract science involving the study of Numbers, Quantities and Space.
I think that's an incomplete definition. Mathematics is primarily about
relationships (i.e. "patterns", in my original brief definition) - many dictionaries correctly highlight this. Nevertheless, your definition appropriately excludes straight
computation (e.g. following a sequence of instructions to add a few numbers together) as a branch of mathematics. For one branch of mathematics is the
study of numbers, but not the
computation of numbers.
If you are at college, I recommend you take some classes on the philosophy or history of mathematics to understand how the debate has proceeded over the centuries as to what mathematics is. Start, if you wish, with Plato's contrast of arithmetician and philosopher in the discussion between Socrates and Protarchus in
Philebus. When you're ready for full blast, read his opinions on the nature of mathematics appropriate for a philosopher-ruler in
Republic - start with the bit where Socrates asks Glaucon what men should study.
BTW, a Dictionary thinks that definition is appropriate. (Ooh, we've got ourselves a logical dilemma

)
No, we haven't. A dictionary is a fallback. The correct way to learn English is to be among English speakers. An English dictionary cannot be used to "prove" a definition.
Moreover, browsing half a dozen dictionary definitions I might conclude that an iPhone
contains a computer (in the sense of an electronic device which computes), but not that it
is a computer - because the general computation facility is encapsulated in something else. For example, that web favourite
Random House (which already horribly conflates "processor" and "computer"): "Also called processor. an electronic device designed to accept data, perform prescribed mathematical and logical operations at high speed, and display the results of these operations. Compare analog computer, digital computer." iPhone clearly includes components which are "designed for this" but it is not as a whole unit "designed for this".
But, again, your only authoritative reference is English speakers.
DMann said:
Yet, you're willing to 'impose domain-specific definitions' by ruling out an iPad, while including a netbook, both which have comparably sized screens.
Chip/shoulder? I have so far mentioned neither an iPad nor a netbook. An iPad is much closer to a layman's idea of a computer than an iPhone is. A netbook, having an even better input device and more freely "accept[ing] data, perform[ing] prescibed mathematical and logical operations..." is certainly a computer.
Not for many real estate brokers, investment traders, and journalists I know.
"No but yes". You're listing three jobs which involve activities for which an iPhone's touch screen is sometimes sufficient. This doesn't mean that it's a suitable general purpose replacement for a keyboard.
Interface a BT keyboard of any size, and you've got a better keyboard than most laptops can offer - are laptops with smaller keyboards and screens, then, de-relegated from computer status?
You've got something closer to a layperson's "computer", but you still have an inadequate screen and limited control. Meanwhile, a cramped keyboard is still a general purpose input device in the way a 3.5" thumb touch screen is not.
Apple are trying hard and, it appears, succeeding in trying to get the public to accept something less than a traditional layperson's computer as an alternative to a computer.