The phrase "a weak defense" is correct and usable in written English.
It can be used when discussing arguments, justifications, or positions that lack strength or effectiveness.
Example: "The lawyer presented a weak defense that failed to convince the jury of his client's innocence."
Alternatives: "a flimsy argument" or "a poor justification."
(Nuance is usually a weak defense in political campaigns).
His poor play was one big reason the Sabres began the season with such a weak defense of their Eastern Conference playoff championship.
Consultation with property owners or communities would end up being a weak defense against the big bulldozers run by the highway crowd.
The Vikings had hoped to offset the loss of receiver Randy Moss to free agency by adding five starters to shore up a weak defense.
SAN FRANCISCO — As the Giants went through their various transformations this season — from a running team to a passing team, from a weak defense to a stout one — the constant was always Eli Manning in the fourth quarter.
Page D3 CHANCE TO ENERGIZE THE JETS Monday's game against the Dolphins, a winless team with a weak defense, presents Jets quarterback Mark Sanchez with a chance to energize the team.
Texas A&M also has a weaker defense than 2012 that loses all of its defensive standouts from last year.
They almost have to; their ability to keep so many balls from going into play allows the Tigers to survive with a weaker defense than most teams.
Connecticut had a weaker defense in 2010 than in previous seasons.
It is typically characterized as a rather weak defense mechanism, designed to restrict pathogen replication until the adaptive immune response generates a tailored response and eliminates the infectious agent.
So under very special conditions one can know that the acquisition a truth will enhance the overall truthlikeness of one's theories, but these conditions are exceptionally narrow and provide at best a very weak defense against the dilemma.
