There is no evidence to suggest that the "competition" is "fierce" as you suggest
"Competition:" the demand for a seat in dental school is greater than the supply. Because admission cannot be purchased, there are certain criteria that are looked for in applicants by different schools. Some value diversity, while others emphasize dedication to community. Some schools may place more emphasis on GPA, while others value the DAT more. Other schools may place considerable weight on applicant ethnic background, while others may seek applicants of particular religious denominations that align with the vision of the school.
*Note: for that last comment, I am not looking for a debate on anything involving opinions on ethnic/religious preference during the admissions process. I have seen some of those threads from previous years, and I do not want this discussion to become ugly.
There is no evidence to suggest that the "competition" is "fierce" as you claim. "
I do believe that "competition is fierce". This of course is subjective. Our opinions as to what quantitavely defines a particular adjective seems to differ. But because applicant to admission ratio is not 1:1, by definition competition DOES exist.
"Many" is not a quantifiable number.
You are correct, "many" is not a quantifiable number. On that thought:
Adcoms are more interested in ascertaining that an applicant is not a potential dropout than what a good guy/gal he/she is.
If you want to pick apart vocabulary, "more" is not quantifiable either. If you want specifics and numbers, I encourage you to lead by example by supporting your arguments with "evidence" that are comparable to your expectations.
Sharing a six pack with a "community service leader" is not likely to be on adcom's priority list.
A 4.0 and 29AA may not do the trick if the applicant has history of academic dishonesty, DUI's, and a number of other misdemeanors on their record. In the opinion of an adcom, this applicant will likely not have any issues with the academic demand of the curriculum; but they may not see this applicant as a "good guy/gal."