And that is exactly the reason I say that if your about to give a customer a time frame that you need to stuff a Twix in your mouth to keep you from speaking. Hell, if a Twix won't shut you up then whip out a machete and cut your tongue off, cut off your fingers if your typing/writing it or whatever else you need to do to NOT give them a hard time frame.

Keep this little fact in mind. In the world of math (since I do analysis type work) we have what we call "Real Numbers" and "Unreal see more Numbers"

A Real Number is a number that is tangible. We have 5 apples on the table, we know it is 5 apples because we can pick each of them up and count them.

An Unreal Number is a number that is NOT tangible. Water is the best example. Have you ever been able to count water? Measure water? Oh sure, you can call a gallon but a gallon is based upon weight. Now, I give 10 people a gallon jug each and ask each of them to put exactly 1 gallon of water in it, off they go to the spicket and each fills it to the line. I drop it on a scale that measure pounds and all 10 appear to be the same, but then I get out a scale that does pounds & ounces and only 8 are correct, 2 are off by a couple of ounces. Next up we bring in a scale that goes Pounds, Ounces and .1 ounces. Guess what, now we have 5 correct. Next we go out to 3 decimal places .001 and we find 2 are correct, finally we go to 5 decimal places and we have a miracle that 1 of them is correct, but when we go to 10 decimal places .0000000001 we find that even he is wrong.

Why? All of them filled it to the line precisely, but none of them are correct, because there is exact way to land on precisely 1 gallon, and if we keep moving the decimal point out we will find that it just doesn't work. A good example of this is a drop of water. You grab an eye drop and sqeeze out 1 drop, then you go outside and get hit with a drop from a thunderstorm, or you walk through a gentle shower and get hit with a drop that is smaller than the thunderstorm drop, perhaps you visit a waterfall and get hit with a drop of sprayback from the fall that is minute, shower's & waterhoses break water into drops but they are different sizes. While each is a drop, they are all different size drops and no 2 drops will ever be the same. That's part of why snowflakes are never identical (there is more to snowflakes than just the size of the drop though).

Why am I using water? Because time and water are both "Unreal Numbers" there is no exact measurement of each, they are both considered to be liquid/pliable/false/Unreal numbers and as such there will never be a concrete answer as to what the exact number is. While we can call it to a certain decimal point, someone else can always prove that answer wrong by just taking it to a further decimal point.

Like Houston said, it's a long winded story and we can go on for hours and days and weeks and months and years... Heck we can even go on for minutes and seconds and milliseconds and nanoseconds and someone will still find a smaller measurement of time by simply moving the decimal point out a few spots further...

The same is true with time.