Many of today's grammar rules can be traced to the opinions of one 18th century writer.
They started as same word, but their meanings have drifted apart over time.
Comedian ISMO on what separates a boot from a trunk
We believe the popular usage of this word is correct
How the irregular 'snuck' sneaked into the dictionary
Why does it sound strange to say 'funner' or 'funnest?'
Figuring it out at once