What's the difference between inflexibleness and pertinacity?

Inflexibleness

Definition:

(n.) The quality or state of being inflexible; inflexibility; rigidity; firmness.

Example Sentences:

(1) In current practice, some of the goals cannot be met; they should be considered as targets worthy of achievement, not as inflexible criteria of acceptance or rejection of methods.
(2) These words reflect a departure from Ankara's recent inflexibility, which led the country to freeze relations with Brussels during the Cypriot presidency of the EU in 2012.
(3) This results in patterns of inflexibility and weakness that can be demonstrated on a tennis-specific musculoskeletal exam, and that can be correlated with areas of increased injury occurrence.
(4) Perforation at the physiologically narrow sites of the esophagus is a wellknown mechanism as is the use of inflexible polyethylen tubes containing a mandrin.
(5) Postural instability was associated with abnormal patterns of postural responses including excessive antagonist activity and inflexibility in adapting to changing support conditions.
(6) It was only his inflexible determination, the quality that had made him a great general, that mastered the torments of ill-health – sleepless nights, fear of dying – to articulate his account for a devoted American audience.
(7) The day-to-day operation of the social security system (especially in universal credit) is crude, inflexible and too often oppressive .
(8) When we protect our old industries with subsidies and inflexible legislation, we risk losing all.
(9) Differences between groups were maintained across situations, and support the utility of conceptualizing personality disorders in terms of inflexible interpersonal styles.
(10) The inflexibility of the present system seems to be a major threat to the principle of regionalization.
(11) Wheras the guidelines may appear to be inflexible, they should not be considered as such.
(12) Traditional silicone prostheses have been found to be inflexible, heavy, and of poor color match when used on the limbs.
(13) When a mode of responding is adopted in noise, subjects are often rather inflexible and continue to use this strategy even though it is inappropriate.
(14) Alan Rusbridger, editor-in-chief of the Guardian, said: "No individual newspaper editorial could hope to influence the outcome of Copenhagen but I hope the combined voice of 56 major papers speaking in 20 languages will remind the politicians and negotiators gathering there what is at stake and persuade them to rise above the rivalries and inflexibility that have stood in the way of a deal."
(15) Ipsa's guidelines on travel expenses suggest MPs should consider "value for money" and whether cheaper, inflexible tickets will end up costing more if travel arrangements change at short notice.
(16) We will make decisions based on real-world outcomes – not inflexible ideology,” Trump said.
(17) Seven dinucleoside monophosphates containing epsilonA (1,N6-ethenoadenosine) and 2'-O-methylcytidine were studied by 360-MHz proton magnetic resonance and compared with unmodified dimers and component monomers at 4, 20, 45, and 75 degrees C. These studies show that the dimers exhibit preference for the gg and g'g' conformations for the C-4'-C-5' and C-5'-O-5' bonds, respectively, and that dimerization induces an increase of the population and inflexibility of the 3'-endo conformations for the ribose ring.
(18) Because of its relative inflexibility, legislation cannot meet the challenge of the subtle and sensitive conflict of values under consideration, nor can it aid in the wise decision making by individuals which is required to assure optimum protection of subjects, together with the fullest effectiveness of research.
(19) It would be foolhardy to offer an inflexible step-care protocol for the management of chronic obstructive pulmonary disease, given its heterogeneity and our uncertainty about its pathogenesis.
(20) Now researchers have developed a soft, flexible robot prototype inspired by starfish, worms and squid that overcomes some of the limitations of inflexible robots like Robbie.