He said PAF does not want 5th Gen AC, & that it also does not want more F-16s?
This is not to say that you are wrong but I am somewhat confused by what you said. Usually (or almost always) no one apart from the arms acquisition bureaucracy that exists within each branch of the military and the top civilian political and bureaucratic individuals involved in the defence decision-making process has any information on arms acquisition. At best, the trial and evaluation officers can tell you the options being evaluated but never the choice that will be made. But it is more probable that they wouldn't even tell you what is being evaluated as in many instances it could be tagged 'classified.' I have been around some highly placed senior PA, PAF, and PN officials and they weren't able to answer questions regarding acquisitions. This is similar to the rumours that I used to come across that 'some military or an intelligence officer told me Pakistan is rolling back its nuclear programme.' People need to consider not all military personnel know everything. On bureaucratic level, the military and defence ministry operates on strictly need to know basis.