Francisco J. Ayala famous quotes

Last updated: Sep 5, 2024

A hypothesis is empirical or scientific only if it can be tested by experience. A hypothesis or theory which cannot be, at least in principle, falsified by empirical observations and experiments does not belong to the realm of science.
-- Francisco J. Ayala

#Principles #Doe #Theory
Insect resistance to a pesticide was first reported in 1947 for the Housefly (Musca domestica) with respect to DDT. Since then resistance to one or more pesticides has been reported in at least 225 species of insects and other arthropods. The genetic variants required for resistance to the most diverse kinds of pesticides were apparently present in every one of the populations exposed to these man-made compounds.
-- Francisco J. Ayala

#Men #Ddt #Population
It is probably fair to estimate the frequency of a majority of mutations, in higher organisms, between one in ten thousand and one in a million per gene per generation.
-- Francisco J. Ayala

#Majority #Mutation #Generations
A few years ago, they [Neandertals] were thought to be ancestral to anatomically modern humans, but now we know that modern humans appeared at least 100,000 years ago, much before the disappearance of the Neandertals. Moreover, in caves in the Middle East, fossils of modern humans have been found dated 120,000-100,000 years ago, as well as Neandertals dated at 60,000 and 70,000 years ago, followed again by modern humans dated at 40,000 years ago. It is unclear whether the two forms repeatedly replaced one another by migration from other regions, or whether they coexisted in some areas
-- Francisco J. Ayala

#Years #Two #Middle East
Toby Tyrrell unravels the various formulations of Gaia and explains how recent scientific developments bring the hypothesis into question. His criticisms are insightful, profound, and convincing, but fair. On Gaia is wonderfully informative and a pleasure to read.
-- Francisco J. Ayala

#Profound #Insightful #Criticism

Books are the basis; purity is the force; preaching is the essence; utility is the principle.
Baptism by immersion for the remission of sins is an essential covenant to make with the Lord. Faith and repentance precede this ordinance. Confirmation and the gift of the Holy Ghost follow baptism. Acceptance of these first principles and ordinances may obtain for us a remission of our sins and assure our salvation. In the ordinance of the sacrament, we regularly renew this and other covenants, and by complying with our part of the covenant, we receive the Spirit of the Lord to be with us.
The first principle of a free society is an untrammeled flow of words in an open forum.
When people attempt to rebel against the iron logic of Nature, they come into conflict with the very same principles to which they owe their existence as human beings. Their actions against Nature must lead to their own downfall.
The distinction between right and wrong ("la distinction du bien et du mal", Fr.), is nothing else than their unyielding (or implacable) opposition; thus the moral consciousness is an innate and intimate revelation of the absolute, which goes beyond (or goes pass, or exceed) every empirical data (or given information). It is only on these principles that we will be able to establish ("pourront Ãªtre Ã©difiÃ©es", Fr.) the real basis of morality.
If one sticks too rigidly to one's principles, one would hardly see anybody.
On general principle, I boycott shows that don't employ actors.
Freedom does not always win. This is one of the bitterest lessons of history.
History does not eliminate grievances. It lays them down like landmines.
While other creators make a big show of their art Mani Sir makes it look as though anyone can do what he does.

Francisco J. Ayala famous quotes

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