Somebody made comments and suggestions on my drafts – can I be reasonably accused of plagiarism? I am a bachelor student. I have been working with a PhD on an article. So the article was supposed to be co-authored; however, he was mainly going to edit  my draft so it can be published. This is, the content of the article was actually my work, while the edition was going to be his part. I have e-mails with all the drafts I have sent to him until the final draft of the article. In these e-mails, one can see that he mainly suggested me to clarify some ideas or was trying to understand the ideas I was pointing out.

On the other hand, we have stopped working together. Thereby I sent him an e-mail, by recommendation of a professor, asking him if he had any inconvenience if I used my drafts for my bachelor thesis (in my country one first obtains the bachelor degree and then one must present the thesis). He answered that my drafts remain my work and that because of this I am free to use them.

The question which I would like to ask is if there would be any inconvenience if I wanted to publish this draft in a journal as long as it is actually my work. People have told me that as long as I have this e-mail where he is recognizing that my drafts remain my work, I would have no inconvenience, however, I wonder if this is enough for I did not ask him about using my drafts for publishing but just for my bachelor thesis.

I am wondering if he could accuse me of plagiarism if I would publish my work. I think that he could not do so because he has written to me that my drafts are my work and thereby I am free to use them. Besides this I have all the e-mails wherewith I could prove that the drafts are totally my production and that his contribution was mainly motivation and making me some suggestions or comments so that I can better clarify myself. Would that be enough in order I can publish my work without any fear of being accused of plagiarism? 

Sending him an e-mail asking him directly is not really an option, for the relationship of work has gone deadly bad.
Based on what you said I have the impression that you are the main contributor to this work and he only had some editorial comments. Therefore, you publishing this work, cannot be classified as plagiarism. (If you think his contribution was sufficient for him to expect you to give him some credit (e.g. second author) then you have to be careful because it may cause further complications between you and him. Besides, it is your responsibility to make sure he gets the credit he deserves)

Most of the times people won't actually act against each other in situations like this. I remember a few years ago, I was stuck in a situation where someone decided to publish a team work with his name as the first author, while it was clear to everybody that he was not the major contributor. My adviser sat me down and told me to let it go (and I accepted because he had good reasons). What I'm trying to say is that in cases like this your supervisor would usually mediate and smooths things out before it gets serious.

However, I think the chances of him even trying to accuse you of plagiarism are very slim. But even so, if you publish this work before him, he needs to have enough evidence that he had major contribution to the work. I assume that this is not the case and it is clear from the emails that were sent to you.

I suggest you to simply let your adviser know that you will try to publish this work and don't worry about the PhD student.