Both of those sentences are correct. In the first sentence, you are considering your doubts separately. The opposite of this is ‘I have no doubts. ‘ In the second sentence, the word ‘doubt’ is an uncountable noun.

Examples of evidence in a Sentence He has been unable to find evidence to support his theory. Investigators could find no evidence linking him to the crime. The jury had a great deal of evidence to sort through before reaching a verdict. There is not a scrap of evidence in her favor.

• Evident functional requirements are functions that are performed with the user’s knowledge. These requirements usually correspond to information exchange between the user and the system, such as queries and data entry, which flows through the system interface.

8 Ways Highly Successful People Overcome Self-Doubt

1. Stop Making Excuses. Self-doubt often makes us rationalize a situation to fit our emotional state.
2. Beware Of Your Close Circle.
3. Raise Your Self-Awareness.
4. Practice Self-Compassion.
5. Stop Asking For Validation.
6. Don’t Talk About Your Plans.
7. Trust Your Values.
8. Start Shipping.

phrase. You use no doubt to emphasize that something seems certain or very likely to you. [emphasis] The contract for this will no doubt be widely advertised. See full dictionary entry for doubt.

used for emphasizing that something seems certain or very likely. No doubt she’ll tell me everything when she’s ready. Synonyms and related words. – Certain or likely to happen.

Synonyms of ‘no doubt’

1. certainly. I’ll certainly do all I can to help.
2. surely. She knew that with enough dedication and work she would surely pass the course.
3. probably. They probably won’t make this plan public until July.
4. of course. There’ll be the usual inquiry, of course.
5. admittedly.
6. doubtless.

: to be uncertain about (something) : to believe that (something) may not be true or is unlikely. : to have no confidence in (someone or something) doubt.

You can say, “on my mind” refers more to what’s presently on your mind while “in my mind” is something that has been there for some time. So: – In my mind means what you think; it means: in your brain, in your head, in your view etc. for example : I have a picture IN MY MIND of a beautiful green valley ;).

Writing is training your mind to think clear and concise.

1. Translate ideas into sentences.
2. Construct a well-structured sentence.
3. Make a point without going in circles.
4. Implement new vocabulary and expressions.
5. Knit your ideas together and assemble the puzzle pieces.