Kernel developers have announced a new device file, /dev/stupidity. It is much faster than /dev/urandom, has an order of magnitude more entropy, works universally, but doesn't run out of data like /dev/random does. The only downside is it requires Internet access.
ls # This will run the ls command without using any alias called ls that might be set. You can do this with any real command. Another way to do this is with 'command ls'.
paste <(cal 2020) <(cal 2021) # Look at the full year calendar for 2020 and 2021 side by side. (Requires a term width >= 138). If you don't have that large of a term, you can change the orientation to vertical like this: { cal 2020 ; cal 2021; } or pipe it to less -S