Zero is considered an even number.

The number 1 is the smallest prime number.

A Mobius strip is a two-dimensional object that has only one side.

In the "Monty Hall" problem (a game show with three doors), if the host opens a door to reveal a goat, switching your choice gives you a better chance of winning than staying with your original door.

The Sahara is largest desert in the world.

Mount Everest is the tallest mountain on Earth when measured from its base to its summit.

Peanuts are technically a type of nut.

"Mercury is toxic. Some vaccines used to contain a form of mercury. Therefore, those vaccines were toxic."

Is this a valid logical argument?

Consider the following argument: "If a doctor works too much, they will become stressed. Doctor Smith is stressed. Therefore, Doctor Smith is working too much."

Is this a logically sound conclusion?

All acids are dangerous and corrosive to human skin

Oxygen is the most abundant gas in the Earth's atmosphere

There is no gravity in outer space, which is why astronauts float.