So ... how will it reply if we say "given that 1899 is a leap year"?
First, there's the possibility of a "fencepost" error: If a child is born March 30 and dies on March 31, we can correctly say the child lived one day (31-30.) However, if the child was born and died a few hours later the same day, was the lifespan zero days or one? Some calculations include the day the child was born as a full day and others do not.
First I calculated the number of days using Linux:
Code:
[me@mycomputer ~]$ date +%s --date 18830330 # Number of seconds from 1 January 1970 to 30 March 1883
-2737819884
[me@mycomputer ~]$ date +%s --date 19050915 # Number of seconds from 1 January 1970 to 15 September 1905
-2028996000
[me@mycomputer ~]$ echo $(((-2028996000 - -2737819884)/86400)) # Subtract, then divide by number of seconds in a day
8,203
The number 8,203 days includes the day on which the person died but not the day when the child was born (or vice-versa.)
I asked 5 different chatbots this question: “How many days did this child live, who was born on March 30, 1883 and died on September 15, 1905, given that 1888, 1892, 1896, 1899, and 1904 were leap years?” ... and got five different answers.
pi.ai: Accepted my assertion 1899 was a leap year, and did not include 1900 was not a leap year. However, it used a flat rate of 30 days per month in 1883 and 1925. Answer: 8,107 days. (Wrong: should be 8,204)
ChatGPT 4o via DuckDuckGo: Ignored my input about 1899 being a leap year, and correctly noted 1900 was not a leap year. However, when calculating the number of days lived in 1905 it accidentally dropped a month and came up 30 days short. Its
answer was 8,173 days (wrong; should be 8,203.)
Llama 3.3 via DuckDuckGo: Correctly noted 1899 was not a leap year despite me saying so, and also correctly noted 1900 wasn't one either. Answer: 8,203 days (correct)
Claude 3 Haiku via DuckDuckGo: Did a totally nonsensical calculation and returned 6,740 days.
o4 mini via DuckDuckGo: Accepted my assertion 1899 was a leap year and returned, "If you include both the birth‐day and the death‐day as “lived” days, you add 1 more ⇒ 8,205 days." (Very close to my answer of 8,203 days.)
Mistral Small 3 via DuckDuckGo: Accepted my instruction to count 1899 as a leap year, and correctly did not include 1900 as a leap year. It had an excellent approach but got the wrong answers when computing the number of days the child lived in 1883 (over by 20 days) and 1905 (under by 10 days), and so returned the wrong answer 8,215 days.