"appropriate and plausible" is a perfectly correct and usable phrase in written English.
You can use it to describe things that appear to be suitable for a certain situation and seem to be credible. For example, "His explanation of the incident sounded appropriate and plausible."
A reconsideration of evidence previously considered by the IOM (2000) on occupational rodent exposure, which demonstrates strong, consistent, temporally appropriate, and biologically plausible relationships, leads to a conclusion of a causal relationship between occupational rodent exposure and exacerbation of asthma in sensitized adult workers.
To further enhance clinical validity, all scenarios will be discussed with stroke clinicians in the project management group to ensure that they are plausible and clinically appropriate and provide an adequate range and variety of cases.
Planning and design of primary research studies and trials needs to take into account whether there are expected and plausible differences across population groups such as sex using appropriate methods such as stratification and pre-planned subgroup analyses.
All are given an appropriate language, plausible turns of phrase to identify their time and nationality; but this does tend to seem effortful; the signalling of identity is too obvious, the masterclass technique too visible.
It will not be appropriate or plausible for all startups to communicate with customers on a one-to-one basis to the extent that Ratty does, but with the variety of communication channels available, ranging from Skype to social media, there is no excuse to not be regularly talking with your customers.
This is forthright and plausible.
This is smart and plausible.
"We thought he was cool and plausible".
He's quite affable and plausible.
All very simple and plausible, as set-ups go. .
