Editing Talk:2213: How Old

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[[User:JohnHawkinson|JohnHawkinson]] ([[User talk:JohnHawkinson|talk]]) 11:21, 9 October 2019 (UTC)         
 
[[User:JohnHawkinson|JohnHawkinson]] ([[User talk:JohnHawkinson|talk]]) 11:21, 9 October 2019 (UTC)         
 
:You mean the base 10 logarithm or the ln? {{unsigned|172.68.65.252|23:13, 9 October 2019}}
 
:You mean the base 10 logarithm or the ln? {{unsigned|172.68.65.252|23:13, 9 October 2019}}
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::Well, '.252, I think "natural logarithm" is pretty clear. It means ''ln''. In this case, I chose the natural log because human development is far more rapid around age 2.718281828 than it is around age 10. So a ''deciln()'' of 10 or 20 or 30 corresponds to an ''e''-year-old, a 7 year-old, or a 20-year-old. Whereas in base 10, it'd be a 10-year-old, a 100-year-old, or a 1000-year-old. That's a lot less useful. I also like the idea of a negative ''deciln()'' indicating a person who probably can't meaningfully speak. If the max human lifetime is 160 years, a ''deciln()'' gives a range from -58 to 51, which is a  more helpful than base ten range of -25 to 22. Contrariwise, I agree that a range -100 to +100 has some appeal, which would suggest a base of 1.6611, but since that's not a common log base, I did not suggest it. [[User:JohnHawkinson|JohnHawkinson]] ([[User talk:JohnHawkinson|talk]]) 23:57, 9 October 2019 (UTC)
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::Well, '.252, I think "natural logarithm" is pretty clear. It means ''ln''. In this case, I chose the natural log because human development is far more rapid around age 2.718281828 than it is around age 10. So a ''deciln()'' of 10 or 20 or 30 corresponds to an ''e''-year-old, a 7 year-old, or a 20-year-old. Whereas in base 10, it'd be a 10-year-old, a 100-year-old, or a 1000-year-old. That's a lot less useful. I also like the idea of a negative ''deciln()'' indicating a person who probably can't meaningfully speak. If the max human lifetime is 160 years, a ''deciln()'' gives a range from -58 to 51, which is a  more helpful than base ten range of -25 to 22. Contrariwise, I agree that a range -100 to +100 has some appeal, which would suggest a base of 1.6611, but since that's not a common log base, I did not sugggest it. [[User:JohnHawkinson|JohnHawkinson]] ([[User talk:JohnHawkinson|talk]]) 23:57, 9 October 2019 (UTC)
 
::: +1! I ''really'' like this idea! [[User:John.Adriaan|John.Adriaan]] ([[User talk:John.Adriaan|talk]]) 04:23, 10 October 2019 (UTC)
 
::: +1! I ''really'' like this idea! [[User:John.Adriaan|John.Adriaan]] ([[User talk:John.Adriaan|talk]]) 04:23, 10 October 2019 (UTC)
 
:::a deciln would be a tenth of a ln, not ten times. [[Special:Contributions/188.114.103.131|188.114.103.131]]
 
:::a deciln would be a tenth of a ln, not ten times. [[Special:Contributions/188.114.103.131|188.114.103.131]]

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