Well, you would really think that if something is flammable it could burn, and if something were inflammable that it couldn't burn, right? Because 'secure' and 'insecure', right?

WRONG. English is not particularly logical! Both 'flammable' and 'inflammable' indicate that something can burn. Of course, the adjective 'inflammable' is really based on the verb 'inflame', which means to set something alight, though now it is used as a figure of speech meaning saying or doing something provocative. But, it sure looks like the same 'in' as in 'insecure'!

PETER THE PROOFER CAN HELP WITH ANY DOCUMENT! 
​$15 per 1000 words, free sample and advice.

Whether something is in, on, at, or across another thing is a surprisingly tricky matter! There are some basic correct forms you can define, but after that there are few rules. It takes years of hearing English, reading English, and speaking English to really absorb all the correct forms for prepositions.

You can be in a room or in a book. You can be on a table or on television. You can be at the door or at the party. You can be across the road or across the topic.

CONFUSED?-   PETER THE PROOFER CAN HELP QUICKLY AND CHEAPLY. $15 per 1000 words.

You may know that colitis is a painful disease of the colon, or large intestine. I'm afraid I can't help with that. You'll have to see a doctor.

However, anybody who has wrestled with documents in English, particularly technical and managerial documents, knows that colonitis, the confusion between the colon ( : ) and the semi-colon ( ; ), is kind of a weird twitch in the brain!

LET PETER THE PROOFER HELP YOU WITH THAT

$15 per 1000 words, FREE SAMPLE AND FREE ADVICE

I borrowed that quote, which means I should footnote it. Except I forgot where I heard it.

​Peter the Proofer can handle all your footnoting problems in the right way. There are different forms of footnoting used by different organisations and universities.
Peter the Proofer knows them all. Don't waste another minute worrying about footnoting!

At this time of year, things get very hectic and a lot of written work gets done at the last minute.
Peter the Proofer is so fast with reviewing and correcting your essay, that he can usually do the job in only a few hours. Don't worry about deadlines, I will get the job done!