My dear friend Shardai shows us how she puts on double prosthetics
#fun #interesting #education
source
#fun #interesting #education
source
Pakicetus attocki, which lived between 55 and 40 million years BCE, is actually the oldest cetacean known to man. The posterior limbs progressively disappeared, species after species.
#education
#education
ELI5: in propositional logic, why does "false implies false" equal to true?
additionally, why does false implies true also equal to true?
say you have a statement,
"If I clap then there will be sound"
p: I clapped
q: there is sound
So if we consider the case where p is false and q is false, so you did not clap your hands and there was no sound, how do can you deduce that if you had clapped your hands there would have been sound? As in, how can you say that the original statement is true?
I understand that the idea is that you assume that the statement is true until proven otherwise, and that the underlying idea behind implications is that they guarantee that p being true means q is also true, and if q is false then p is also false, but why are all other cases automatically considered true?
I understand now, thank you very much for the help guys!
#education
additionally, why does false implies true also equal to true?
say you have a statement,
"If I clap then there will be sound"
p: I clapped
q: there is sound
So if we consider the case where p is false and q is false, so you did not clap your hands and there was no sound, how do can you deduce that if you had clapped your hands there would have been sound? As in, how can you say that the original statement is true?
I understand that the idea is that you assume that the statement is true until proven otherwise, and that the underlying idea behind implications is that they guarantee that p being true means q is also true, and if q is false then p is also false, but why are all other cases automatically considered true?
I understand now, thank you very much for the help guys!
#education
What the U.S. Imports from Canada and Mexico
Given the large amount of machinery and transports brought in from Mexico, how widespread could the effects of the proposed US tariffs be?
#education
Given the large amount of machinery and transports brought in from Mexico, how widespread could the effects of the proposed US tariffs be?
#education
A metal detectorist that unearthed an elderly old farmer’s Rolex after it was eaten by a cow five decades ago.
#education
#education
