Seth Shostak

Astronomers still can't decide what the shape of our universe is. Is it closed and finite, which is to say, is there a countable tally of all the galaxies that exist, even beyond the ones we can see? Or is it infinite? The latter possibility is still on the table.

American Scientist

Sam Kean

Except for certain moments - when cells are dividing, for instance - chromosomes don't form compact, countable bodies inside cells. Instead, they unravel and flop about, which makes counting chromosomes a bit like counting strands of ramen in a bowl.

American Writer

Countable usually refers to things you can physically count, like apples, books, or cars.

Real-life Objects

Countable nouns can be singular or plural; their form changes with number.

Plurals Matter

Use countable nouns with numbers and words like 'many', 'few', or 'several'.

Use with Numbers

In math, countable sets are infinite but can still be listed like natural numbers.

Mathematical Sets

A countable set in math has a one-to-one correspondence with the set of positive integers.

Pairing Concept

Some infinite sets are countable, unlike uncountable sets like real numbers.

Infinite Yet Countable

In philosophy, countable often refers to the idea of identifying unique individuals.

Distinct Entities

Countable implies recognizing each member of a group as separate and unique.

Individual Differentiation

 since 6 is not a power of any prime number. Luckily, his bosses weren't very good in math, so his job is safe. The night manager's strategies are only possible because while the Infinite Hotel is certainly a logistical nightmare, it only deals with the lowest level of infinity, mainly, the countable infinity of the natural numbers,

The Infinite Hotel...

 and what I'm seeing happening right now -- I said this to you the other day, Chris -- is there's a relatively small percentage of the population who will suffer physically from this disease, and there's a larger percentage who are going to suffer economically from it. But then there's this massive, uncountable number of people

It's OK to feel...

 I also like that countable marine nettles guard battle-scarred count the