Re: \"Price too good to be true\"
There is no word game here. The game/problem is in definitions of terms which people have different understandings. Such confusions are due to the education system on the earth which is claimed to be objective. We see it's not. I will explain what I am trying to tell by an example/s;
That bridge's real rate is not 100,000 pounds actually, but more than 500,000 pounds. They don't say the truth (its real rate) and they say it is an "overbuilt" bridge.
Lets take a simpler example; a tractor. What quantity/parameter do you use to rate it? HP or KW, i.e. Power, isn't it? What's the simplest definition of the term Power? It's energy per time. Enegry units are joule or cal. Then, there is time there. What is it? Usually, it's taken as seconds to find the power. For ex. KW = KiloJoule / Second.
In old days, people didn't know about milliseconds, nanoseconds, etc. So, they usually used "second" as "instant" moment, smallest time interval. Using a tractor for 1 hour energy and calculating its power using "second" may not be a problem. But lets imagine this; your tractor will be used for 1000 (tousand) years to pull the same attachment nonstop. Now, you know how much energy (in joule or calory) you need. Say it is A joules. Divide it to 31536000000 seconds (total seconds in 1000 years) to find the power W. Lets say it is X Watts. Now, do the same by assuming you will use that tractor for 1 hour (3600 seconds). Your energy need is, say, B joules. Divide it to 3600 seconds to calculate the power you need from your tractor. Lets say it is Y Watts.
Now, accoding to the education system/science/technology, X = Y... because it's assumed that energy need changes with time linearly and continuously. And this assumption is valid even for 100000000 years... This is wrong. Science / technology / education system save themselves by introducing a new term like "fatique" not to take the "long term/time" periods in calculating the power. They use "instant energy" concept (usually, for ex., energy amount in 1 second) when calculating the power. But this "instant" time interval is NOT infinitesimal, but only 1 second. Mathematically/theoretically, there may exist an infinitesimal time interval and X may be equal to Y. But physically/in real life, things are different and X is not equal to Y. That's why they define a new term "fatique", a failure in time.
So, as a conclusion, if you consider all factors in designing of which many of them are ignored/neglected by the designers, no product today is overbuilt.
ps: sorry about long post. Next time, will keep it shorter by a simpler example to tell what I meant.