Ali's grammar tip #1

I try very hard not to be one of those grammar nazis who corrects others on the internet. I don’t think there are any prizes, or is a whole lot of goodwill on offer, for being that person. But I work as an editor, trained to spot such mistakes, I have done the Cambridge CELTA (Certificate in Teaching English to Speakers of Other Languages) and sometimes it distresses me to read the world wide web.

The reality is, I think I am a language purist. I am not really interested in language evolving. I prefer it in original form. However, I know that even the best people make typos and mistakes in haste and distraction. We all do it, and, as we all know, some forms of social media don't allow you to correct yourself. But, there is a very common error made, that I see and hear constantly in writing and speech, that I think it is now so prevalent nobody notices anymore - except those who are language purists, that is. But I have decided to point it out, for the better of mankind. So, what is wrong with this sentence below:

I am going to try and fix the dishwasher.

or this one:

Do you want to go and see a movie?

I am going to put the answer in a comment, so you have time to think about it.